Awesome Python Applications

Case studies in successfully shipping Python software

As developers, we spend our days with code. The site you're reading this on is mostly modules, packages, libraries, frameworks, and the like. But users see applications.

When building our own applications, open-source Python applications are a gold mine of practical patterns that we know work together. A production application is worth a thousand blog posts and Stack Overflow answers.

This document is an always-growing list of 203 open-source Python applications arranged by topic, with links to repositories, docs, and more. If you have one to add or find some information missing, please let us know!

Read the announcement post to learn more about this list.

Contents

1. Internet (14)
2. Audio (10)
3. Video (4)
4. Graphics (8)
5. Games (6)
6. Productivity (9)
7. Organization (9)
8. Communication (21)
9. Education (4)
10. Science (12)
11. CMS (9)
12. ERP (4)
13. Static Site (6)
14. Dev (80)
    1. SCM (12)
    2. Code Review (3)
    3. Ops (17)
    4. Security (5)
    5. Docs (2)
    6. Editor (10)
    7. Package Managers (8)
    8. Package Repositories (3)
    9. Build (8)
    10. Shell (3)
    11. Other Dev projects (9)
15. Misc (9)

Internet

1. Canto - (Repo, WP) RSS daemon and curses-based client. (linux, curses)
2. Deluge - (Repo, Home) Popular, lightweight, cross-platform BitTorrent client. (linux, windows, mac, server, gtk)
3. gPodder - (Repo, Home) Simple, mature media aggregator and podcast client. (linux, windows, mac, gtk)
4. Neubot - (Repo, Home) Lightweight agent which collects data for net-neutrality research. (linux, windows, mac)
5. Pi-Hole - (Repo, Home, WP) Linux network-level advertisement and internet tracker blocking application which acts as a DNS sinkhole, and (optionally) a DHCP server, intended for use on a private network. (linux, server)
6. Planet - (Repo, Home, WP) RSS and Atom feed aggregator, designed to collect posts from the weblogs of members of an Internet community and display them on a single page. Used to power Planet Python and many more. (server)
7. Qute Browser - (Repo, Home) Keyboard-driven, minimal, vim-like browser based on PyQt5 (linux, windows, mac, qt5)
8. Reddit - (Repo, Home) Social news forum with voting, commenting, karma, and more. (Archival repo from 2017.) (server)
9. SABnzbd - (Repo, Home, Docs) Simple, cross-platform newsreader for downloading from Usenet. Supports many integrations and 16 languages. (linux, windows, mac, server)
10. streamlink - (Repo, Home, PyPI) Command-line utility that extracts streams from various services and pipes them into a video player of choice. (linux, windows, mac)
11. Tribler - (Repo, Home, WP) Privacy enhanced BitTorrent client with P2P content discovery. (linux, windows, mac, qt5)
12. You-Get - (Repo, Home) Command-line program to browserlessly scrape and stream video, audio, and images from web sites. (linux, windows, mac)
13. youtube-dl - (Repo, Home, PyPI) Command-line program to browserlessly archive video and audio from YouTube and hundreds of other sites. (linux, windows, mac)
14. ZeroNet - (Repo, Home, WP, Docs) Open, free, and uncensorable websites, using Bitcoin cryptography and BitTorrent network. (linux, windows, mac)

Audio

1. Beets - (Repo, Home, PyPI) Feature-rich command-line music library manager with web UI, duplicate detection, transcoding, and tagging support, integrating with MusicBrainz, Discogs, and more. (linux, windows, mac)
2. Exaile - (Repo, WP) Cross-platform audio player, tag editor, and library organizer. (linux, windows, mac, gtk)
3. Frescobaldi - (Repo, WP) An editor for LilyPond music files. (linux, windows, mac, qt)
4. Friture - (Repo, Home) Visualizes and analyzes live audio data in real-time, including scope, spectrum analyzer, rolling 2D spectrogram, and more. (linux, windows, mac, qt5)
5. GNU Radio - (Repo, Home, WP) Software development toolkit that provides signal processing blocks to implement software-defined radios and signal-processing systems. (linux, windows, mac, cpp, qt)
6. GNU Solfege - (Repo, WP) An ear-training program intended to help musicians improve their skills. (linux, windows, mac, gtk)
7. MusicBrainz Picard - (Repo, Home, WP) Automatically identify, tag, and organize music albums and other digital audio recordings. (linux, windows, mac, qt)
8. PuddleTag - (Repo, WP) An audio tag (metadata) editor for audio file formats. (linux, qt4)
9. Quod Libet - (Repo, WP) Cross-platform audio player, tag editor, and library organizer. (linux, windows, mac, gtk)
10. SoundConverter - (Repo, WP) A GNOME-based audio file transcoder. (linux, gtk)

Video

1. Flowblade - (Repo, WP) Multitrack, non-linear video editing software for Linux. (linux, gtk)
2. OpenShot - (Repo, Home, WP) A cross-platform video editor for FreeBSD, Linux, macOS, and Windows. (linux, windows, mac, qt5)
3. Pitivi - (Repo, WP) Non-linear video editor for Linux, based on GStreamer. (linux, gtk)
4. Plumi - (Repo, WP) Video sharing content management system based on Plone. (cms, linux, mac, plone)

Graphics

1. FreeCAD - (Repo, WP) General-purpose parametric 3D CAD modeler and a building information modeling (BIM) software with finite-element-method (FEM) support. (linux, windows, mac, cpp, qt)
2. MakeHuman - (Repo, WP) 3D computer graphics software designed for the prototyping of photo realistic humanoids. (linux, windows, mac, qt)
3. Meshroom - (Repo, Home) Photogrammetry pipeline, for turning photographs into 3D models (linux, windows, mac, qt)
4. MyPaint - (Repo, Home, WP) Raster graphics editor for digital painters with a focus on painting rather than image manipulation. (linux, windows, mac, gtk)
5. OCRFeeder - (Repo, WP) An optical character recognition suite for GNOME, with support for command-line OCR engines like CuneiForm, GOCR, Ocrad and Tesseract. (linux, gtk)
6. OCRopus - (Repo, WP) Document analysis and optical character recognition (OCR) system. (linux, mac, console)
7. PhotoCollage - (Repo) Automatically lays out a photo collage to fill out a given poster space. (linux, gtk)
8. SK1 - (Repo, Home, WP) Feature-rich, cross-platform illustration program. (linux, windows, mac, gtk, wx)

Games

1. Frets on Fire X - (Repo) Highly customizable rhythm game supporting many modes of guitar, bass, drum, and vocal gameplay for up to four players. (linux, windows, pygame)
2. Lucas Chess - (Repo, Home) Featureful chess client for Windows, with some Linux support. (linux, windows, qt4)
3. Lutris - (Repo, Home) Gaming platform for GNU/Linux, managing game installations with a unified interface. (linux, gtk)
4. PyChess - (Repo, Home) Advanced chess client, suitable for new, casual, and competitive play. (linux, windows, gtk)
5. PySolFC - (Repo, Home, Android) Highly-portable collection of solitaire card games. (linux, windows, android, kivy, tk)
6. Unknown Horizons - (Repo, Home) 2D real-time strategy simulation with an emphasis on economy and city building. (Not unlike Age of Empires) (linux, windows, mac)

Productivity

1. Autokey - (Repo, PyPI) Desktop automation utility for Linux and X11. (linux, gtk, qt)
2. Bleachbit - (Repo, Home) System cleaner designed to free disk space and maintain privacy. (linux, windows, gtk)
3. BorgBackup - (Repo, Home) Deduplicating backup system with optional encryption and other features. (linux)
4. Bup - (Repo, Home) Efficient backup system based on the git packfile format, providing fast incremental saves and global deduplication. (linux, mac)
5. Excalibur - (Repo, Home) Web interface to extract tabular data from PDFs. (linux, windows)
6. gmvault - (Repo, Home) Tool for backing up gmail accounts. (linux, windows, mac, qt5)
7. Metamorphose - (Repo, Home) Graphical mass renaming program for files and folders. (linux, windows, mac, wx)
8. nvda - (Repo, Home) Non-Visual Desktop Access, a powerful screen reader for Windows. (windows, wx)
9. Ranger - (Repo, Home) Console-based file manager, inspired by vim. (linux, curses)

Organization

1. Calibre - (Repo, Home) E-book manager designed for viewing, converting, editing, and cataloging e-books in all major formats. (linux, windows, mac, qt5)
2. CherryTree - (Repo, Home) Hierarchical wiki-like personal notepad, featuring rich text and syntax highlighting. (linux, windows, gtk)
3. Gramps - (Repo, Home) Genealogy software that is both intuitive for hobbyists and feature-complete for professional genealogists. (linux, windows, mac, gtk)
4. Invenio - (Repo, Docs) Customizable platform for running a trusted digital repository. (linux)
5. OpenLibrary - (Repo, Home, WP) Web application for an open, editable library catalog, used by The Internet Archive towards building a web page for every book ever published. (linux, windows, mac, docker)
6. PyMedusa - (Repo, Home) Video library manager for TV shows, with automatic download support. (linux, windows)
7. Radicale - (Repo, Home, Docs) Simple CalDAV (calendar) and CardDAV (contact) server. (server)
8. Wikid Pad - (Repo, Home) Desktop wiki notebook for storing your thoughts and ideas. (linux, windows, mac, wx)
9. Zim Wiki - (Repo, Home) Desktop wiki designed for note-taking, list-making, and drafting. (linux, windows, gtk)

Communication

1. Abilian SBE - (Repo, Home) A "Social Business Engine" with features including lightweight document management, discussions, wikis, timelines, and more. (cms, server)
2. Askbot - (Repo, Home) Q&A web platform similar to StackOverflow, complete with tagging, reputation, badges, and more. (server, corp)
3. Bitmessage - (Repo, Docs) Reference client for Bitmessage, a peer-to-peer encrypted decentralised communication protocol (linux, windows, mac, curses, kivy, qt4)
4. Gajim - (Repo, WP) Lightweight, cross-platform instant messaging client for the XMPP protocol. (linux, windows, mac, gtk)
5. GlobaLeaks - (Repo, Home) Web application to enable secure and anonymous whistleblowing initiatives (server)
6. Helios Voting - (Repo, Home) End-to-end verifiable voting system. (server)
7. Magic Wormhole - (Repo, PyPI, Docs) Security- and speed-focused file transfer tool with support for files, text, and directories. (linux, mac, console)
8. Mailman - (Repo, Home, WP) The original listserv, a web application and email server for managing subscriptions and discussion archives. (server)
9. Mailpile - (Repo, Home) Fast email client with user-friendly encryption and privacy features (linux, windows, mac)
10. Modoboa - (Repo, Home) Mail hosting and management platform including web UI based on Django. Provides useful components such as an admin panel and webmail. Integrates with Postfix or Dovecot. (server)
11. MoinMoin - (Repo, Home, WP, Docs) Python's own web-based wiki software, used for the official Python wiki and many others. (server)
12. OfflineIMAP - (Repo, Home, WP) IMAP reader and synchronizer. (linux)
13. Pootle - (Repo, Home, WP) Web application for collaborative translation. (server)
14. pycsw - (Repo, WP) Full implementation of the OpenGIS Catalogue Service Implementation Specification. (server)
15. RapidSMS - (Repo, Home, Docs) Interactive SMS text messaging platform. (server)
16. Seafile - (Repo, WP) Cross-platform file hosting and synchronization system. (server)
17. Synapse - (Repo, Home) Reference server for the matrix.org distributed chat protocol. Used daily by tens of thousands at riot.im. (server)
18. TahoeLAFS - (Repo, Home, WP) Decentralized cloud storage system for robust distributed data storage. (linux, windows, mac)
19. Virtaal - (Repo, Home) Cross-platform GUI for performing translation, with support for a variety of formats. (linux, windows, mac, gtk)
20. Weblate - (Repo, Home, PyPI) Web based localization tool with tight version control integration. (server)
21. Zulip - (Repo, Home, WP, Docs) Powerful chat server and web client with support for threaded conversations. (server)

Education

1. Anki - (Repo, Home, Docs) Powerful desktop application for flash cards and memorization. (linux, windows, mac, qt5)
2. Mnemosyne - (Repo, Home) Spaced-repetition flashcard program for efficient memorization. (linux, windows, mac, qt5)
3. NBGrader - (Repo, Docs) Jupyter-based application which enables educators to create, assign, and grade assignments in notebook form. (server)
4. Open edX Platform - (Repo, Home) Platform for online education providers, powering edX. (server)

Science

1. AnuGA - (Repo, Home) Advanced simulation of the shallow water equation, for modeling tsunamis, dam breaks, and floods. (linux, windows)
2. ASCEND - (Repo, Home, WP) Mathematical chemical process modelling system developed at Carnegie Mellon University since late 1978. (linux, windows, mac, gtk)
3. CellProfiler - (Repo, Home, Manual, Docs) Interactive data exploration, analysis, and classification of biological image sets. (linux, windows, mac)
4. CoCalc - (Repo, Home, WP) Collaborative calculation in the cloud, with support for the scientific Python stack, SageMath, R, LaTeX, Markdown, and more. Also features chat, course management, and other supporting functionality. (server)
5. Dissem.in - (Repo, Home, Docs) Web platform to help researchers upload their papers to open-access repositories. (server, django)
6. InVesalius - (Repo, Home, WP) Generates virtual reconstructions of structures in the human body for medical purposes, including CT and MRI scans. (linux, windows, mac, gtk)
7. Mayavi - (Repo, Home) General purpose, cross-platform tool for 2-D and 3-D scientific data visualization. (linux, windows, mac, qt4)
8. Orange - (Repo, Home, WP) Component-based data mining software for graphical interactive data analysis and visualization. (linux, windows, mac, qt4, qt5)
9. Pybliographer - (Repo, Home) Bibliographic database manager with a user-friendly desktop UI. (linux, gtk)
10. Sage Math - (Repo, Home, WP) Cross-platform computer algebra system with features covering many aspects of mathematics, including algebra, combinatorics, graph theory, numerical analysis, number theory, calculus, and statistics. (linux, windows, mac)
11. SOFA Statistics - (Repo, Home) User-friendly statistics and analysis with a learn-as-you-go approach. (linux, windows, mac, wx)
12. Veusz - (Repo, Home) 2D and 3D scientific plotting, designed to produce publication-ready PDF or SVG graphs. (linux, windows, mac, qt)

CMS

1. Abilian SBE - (Repo, Home) A "Social Business Engine" with features including lightweight document management, discussions, wikis, timelines, and more. (communication, server)
2. Django-CMS - (Repo, Home) Enterprise content management system based on the Django framework with version control, multi-site support, and more. (server, django)
3. Ella - (Repo, Docs) Django-based content management system with a focus on high-traffic news sites and Internet magazines. (server, django)
4. Mezzanine - (Repo, Home) Consistent and flexible content management platform built on the Django framework. (server, django)
5. Plone - (Repo, Home, WP) Extensible enterprise content management system built on Zope. (server)
6. Plumi - (Repo, WP) Video sharing content management system based on Plone. (video, linux, mac, plone)
7. PyCon - (Repo, Home, Docs) Content management and conference organization web application, based on Django and Symposion. (server, django)
8. Saleor - (Repo, Home) Modular, high-performance e-commerce storefront built with Django, GraphQL, and ReactJS. (server, django)
9. Wagtail - (Repo, Home) A Django content management system focused on flexibility and user experience. (server, django)

ERP

1. ERP5 - (Repo, Home, WP) Web-based ERP, CRM, DMS, and Big Data system with hundreds of built-in modules, designed for corporate scalability. (server)
2. ERPNext - (Repo, Home, WP) Web-based ERP system with accounting, inventory, CRM, sales, procurement, project management, and HR. Built on Frappe and MariaDB. (server)
3. Odoo - (Repo, Home, WP) Web-based ERP and CRM with many built-in modules, plus thousands of apps to suit any business. (server)
4. Tryton - (Repo, Home, WP, Docs) Modular web-based ERP, designed for companies of all sizes. (server, fdn)

Static Site

1. Cactus - (Repo, PyPI) Static website generator using Django templates. (linux, windows, mac)
2. Chert - (Repo, PyPI) Static site generator with built-in support for listicles, created by this humble author, used to power calver.org, zerover.org, and sedimental.org, the author's blog. Mostly here as an easter egg :) (linux, windows, mac)
3. Hyde - (Repo, Home, PyPI) Static site generator which began as the Python counterpart to Jekyll. (linux, windows, mac)
4. Lektor - (Repo, Home) Static site generator with built-in admin console and minimal desktop application. (linux, windows, mac)
5. Nikola - (Repo, Home, PyPI) Command-line static site generator with incremental rebuilds and support for Markdown, reST, Jupyter notebooks, and HTML. (linux, windows, mac)
6. Pelican - (Repo, Home, PyPI) Command-line static site generator that supports Markdown and reST syntax. (linux, windows, mac)

Dev

Projects related to software development and adjacent technical areas.

SCM

1. Allura - (Repo, Home, WP) Software forge, with support for git, hg, and svn. (server)
2. Git Cola - (Repo, Home) Featureful cross-platform GUI wrapper for git. (linux, windows, mac, qt4, qt5)
3. GNU Bazaar - (Repo, Home, WP) Distributed and client-server revision control system. (linux, windows, mac)
4. Kallithea - (Repo, WP) Software forge for Mercurial and Git with a built-in push/pull server, full text search, and code-review. Forked from RhodeCode in 2014. (server)
5. Mercurial - (Repo, Home, WP) Cross-platform distributed revision-control system designed for high performance and advanced branching/merging capabilities. (linux, windows, mac)
6. Pagure - (Repo, Home) Software forge focused on git and developed by the Fedora engineering team. (server)
7. Patchwork - (Repo, Home, Docs) Web-based patch tracking system designed to facilitate code contribution to an open-source project. Designed and used for Linux kernel subsystem development. (server)
8. RhodeCode - (Home, WP) Self-hosted platform for behind-the-firewall source code management, providing centralized control over Git, Mercurial, and Subversion. (server, corp)
9. Roundup - (Repo, WP) Highly-customizable issue tracking system featuring command-line, web, and email interfaces, used by the official Python bug tracker at bugs.python.org. (server)
10. TortoiseHg - (Repo, Home, Docs) Windows shell extension and a series of applications for the Mercurial distributed revision control system. Also includes GNOME and CLI support. (linux, windows, qt4, qt5)
11. Trac - (Repo, WP) Enhanced web-based wiki and issue tracking system for software development projects. (server)
12. ViewVC - (Repo, Home) Browser interface for CVS and Subversion version control repositories. (server)

Code Review

1. Meld - (Repo, Home) Visual diff and merge tool targeted at developers, providing two- and three-way comparison of both files and directories, and supports many version control systems including Git, Mercurial, Bazaar, and Subversion. (linux, windows, mac, gtk)
2. Review Board - (Repo, Home) Extensible code review tool for projects and companies of all sizes. (server)
3. Rietveld - (Repo, Home, WP) Django-based collaborative code review tool for Subversion written by Guido van Rossum to run on Google AppEngine. The basis for Gerrit. (server)

Ops

1. Ansible - (Repo, Home, Docs) Agentless, playbook-based automation. (linux, mac, corp)
2. Barman - (Repo) Remote backup and disaster recovery for PostgreSQL. (linux)
3. Cobbler - (Repo, Home, WP) Linux installation server that allows for rapid setup of network installation environments. (linux, server)
4. fail2ban - (Repo, Home, WP) Daemon to ban hosts that cause multiple authentication errors on Linux servers. (linux)
5. Ganeti - (Repo) Virtual machine cluster management tool built on existing virtualization technologies such as Xen and KVM. (linux, haskell)
6. Gunicorn - (Repo, Home, PyPI) Pluggable, pre-fork WSGI server, started as the counterpart to Unicorn. (server)
7. Iris - (Repo, Home) Flexible automated incident paging system, developed by and used at LinkedIn. (server, corp)
8. NColony - (Repo, Home) Process manager and monitor. (linux, mac)
9. Oncall - (Repo, Home) Calendar tool designed for on-call management and scheduling, developed by and used at LinkedIn. (server, corp)
10. OpenStack - (Repo, Home, Docs) Cloud operating system that controls large pools of compute, storage, and networking resources throughout a datacenter, manageable through a web-based dashboard. (server, corp)
11. pgcli - (Repo, Home, PyPI) Interactive PostgreSQL client that does auto-completion and syntax highlighting. (linux, mac)
12. Salt Stack - (Repo, Home) Automation for the management and configuration of any infrastructure or application at scale. (server, corp)
13. Shinken - (Repo, Home) Shinken is a modern, Nagios-compatible monitoring framework, designed to scale for large environments. (server)
14. StackStorm - (Repo, Home) Rules- and event-driven operational automation for auto-remediation, security responses, troubleshooting, deployments, and more. (server, corp)
15. Supervisor - (Repo, Home) Process manager and monitor. (linux, mac)
16. Vespene - (Repo, Home, Docs) Build and self-service automation platform, built on Django and PostgreSQL. (linux, mac)
17. WAL-E - (Repo) Continuous archiving of PostgreSQL WAL files and base backups. (linux)

Security

1. Cowrie - (Repo, Home) Medium interaction SSH and Telnet honeypot designed to log brute force attacks and the shell interaction performed by the attacker.
2. MITMproxy - (Repo, Home) Interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.
3. PyEW - (Repo, Docs) Malware analysis tool, with support for hexadecimal viewing, disassembly, PE and ELF formats, plugins, and more.
4. sshuttle - (Repo, Docs) Transparent network proxy server that uses SSH to achieve VPN-like results, without requiring root access. (linux, mac)
5. XSStrike - (Repo, Home) Cross Site Scripting (XSS) detection suite equipped with multiple hand-written parsers, a payload generator, a fuzzing engine, and a performance-focused crawler.

Docs

1. asciidoc - (Repo) Text document format for writing notes, documentation, articles, books, slideshows, man pages & blogs.
2. Sphinx - (Repo, Home) Documentation tool for interconnected bodies of authorship, from code documentation to books. Used by the official Python docs, and many other projects (not all of them Python).

Editor

1. Eric IDE - (Repo, Home) Python editor and IDE, based on Qt, integrating Scintilla editor control. (linux, windows, mac, qt5)
2. Gedit - (Repo) The default GNOME text editor makes extensive use of Python, in addition to C. (linux, c, gtk)
3. Jupyter Notebook - (Repo, Home) Web-based, extensible notebook environment for interactive computing. (linux, windows, mac)
4. Komodo Edit - (Repo, Home) Multi-language code editor, written in JS, Python, and C++, based on the Mozilla platform. (linux, windows, mac, cpp, js)
5. Leo Editor - (Repo, Home) Personal Information Manager (PIM), IDE, and outliner with a holistic approach to programming and writing. (linux, windows, mac, qt5)
6. mu - (Repo, Home) A small, simple editor designed for beginner Python programmers. (linux, windows, mac, qt5)
7. Ninja IDE - (Repo, Home, WP) Cross-platform Python IDE with project management, linting, extensions, and more. (linux, windows, mac, qt5)
8. Pluma - (Repo) Small and lightweight UTF-8 text editor for the MATE environment. Based on gedit. (linux, c, gtk)
9. Spyder IDE - (Repo, Home) Scientific editing and execution environment designed by and for scientists, engineers, and data analysts using Python. (linux, windows, mac, qt5)
10. Thonny - (Repo, Home, WP) Cross-platform Python IDE for beginners, designed for learning to code. (linux, windows, mac, tk)

Package Managers

1. Conda - (Repo, Home, WP) OS-agnostic, system-level binary package manager and ecosystem, with a focus on Python and high-performance scientific computing. (linux, windows, mac, corp)
2. dnf - (Repo, WP, Docs) Dandified YUM (DNF) is the successor to yum and works everywhere yum worked. (linux, corp)
3. pip - (Repo, Home, WP) Python's go-to package manager, with a wide range of features and platform support. (linux, windows, mac)
4. pipenv - (Repo, Docs) Wrapper around pip, virtualenv, and pip-tools for a more holistic package management workflow. (linux, windows, mac)
5. Poetry - (Repo, Home, Docs) An independent approach to Python dependency management and packaging. (linux, windows, mac)
6. Portage - (Repo, WP) Platform-agnostic Package management system created for and used by Gentoo Linux and also by Chrome OS, Sabayon, and Funtoo Linux. Inspired by FreeBSD ports. (linux)
7. Solaris IPS - (Repo) Software delivery system backed by network repository, featuring safe execution for zones, use of ZFS for efficiency and rollback, preventing the introduction of invalid packages, and efficient use of bandwidth. (linux, corp)
8. yum - (Repo, Home, WP) Automatic updater and package installer/remover for RPM-based systems (Fedora, RHEL, etc.). (linux, corp)

Package Repositories

1. Bandersnatch - (Repo) PyPI mirror client complying with PEP 381. (server, corp)
2. devpi - (Repo, Docs) PyPI staging server, as well as a packaging, testing, release tool, complete with web and search interface. Like a local PyPI. (server)
3. Warehouse - (Repo) Server software that powers PyPI, where most Python libraries are downloaded from. (server, fnd)

Build

1. bitbake - (Repo, WP, Docs) Generic task execution engine that allows shell and Python tasks to be run efficiently and in parallel while working within complex inter-task dependency constraints. (linux)
2. buildbot - (Repo, WP, Docs) Job scheduling system tailored to the needs of continuous integration and software packaging. (server)
3. Buildout - (Repo, WP, Docs) Extensible deployment automation tool designed for application-centric assembly and deployment, as well as repeatable Python software builds. (linux, windows, mac)
4. GYP - (Repo, Home, WP) AKA 'Generate Your Projects', a build system that generates other build systems. (linux, windows, mac)
5. Meson - (Repo, Home) Build system designed for speed and user-friendliness. (linux, windows, mac)
6. Pants - (Repo, Home) Build system designed for monolithic repositories. (linux, mac, corp)
7. SCons - (Repo, Home, WP) Domain-specific language and build tool, designed to replace Make, autoconf, and ccache. (linux, windows, mac)
8. Waf - (Repo, Home, WP, Docs) Cross-platform build system designed to improve on SCons. (linux)

Shell

1. Ergonomica - (Repo, Docs) Cross-platform shell language based on S-expressions combined with traditional shell features. (linux, windows, mac)
2. Oil - (Repo, Home) A new bash- and dash backwards-compatible shell, with an improved language of its own. (linux)
3. Xonsh - (Repo, Home) Cross-platform shell language and command prompt. The language is a superset of Python 3.4+ with additional shell primitives. (linux, windows, mac)

Other Dev projects

1. Coala - (Repo, Home) Unified command-line interface for linting and fixing code, regardless of programming language.
2. IPython - (Repo, Docs) Set of enhancements to Python, wrapping it for richer interactivity.
3. Locust - (Repo, Home, Docs) Scalable user load testing tool for web sites, featuring an interactive web interface. (server)
4. PINCE - (Repo) Debugging frontend for GDB focused on reverse engineering video games. (linux, qt5)
5. RedHat Anaconda - (Repo, Docs) Installation program used by Fedora, Red Hat Enterprise Linux, and other Linux distributions. (linux, gtk)
6. Robot Framework - (Repo, Home) Generic, cross-platform, and language-independent automation framework for acceptance testing, acceptance test driven development (ATDD), and robotic process automation (RPA). Extensible in Python and Java.
7. Sentry - (Repo, Home) Web service and frontend for cross-platform application monitoring, with a focus on error reporting. (server, corp, flask)
8. Ubiquity - (Repo, WP) The default installer for Ubuntu and its derivatives, designed to be run from Live CD or USB. (linux, gtk, qt)
9. Voltron - (Repo) Extensible debugger wrapper aiming to improve the user experience of various debuggers, such as LLDB, GDB, and WinDbg. (linux, windows, mac)

Misc

1. Guake - (Repo, Home) Drop-down terminal for GNOME, reminiscent of first-person game command consoles. (linux, gtk)
2. Home Assistant - (Repo, Home) Home automation platform that puts local control and privacy first. (linux)
3. JARVIS on Messenger - (Repo, Home) Facebook Messenger bot with a wide assortment of features. (server)
4. Nicotine+ - (Repo) Graphical desktop client for the Soulseek peer-to-peer system. (linux, windows, gtk)
5. Nimbus - (Repo, Home) Infrastructure-as-a-Service platform geared toward scientific cloud computing. (linux)
6. OpenLP - (Repo, Home) Presentation software geared toward church usage. (linux, windows, mac, qt5)
7. qtile - (Repo, Home) A small, flexible, scriptable tiling window manager. (linux)
8. Wicd - (Repo, Home, WP) Graphical utility for managing wired and wireless connections on Linux. (linux, gtk)
9. Xpra - (Repo, Home) Cross-platform remote display server and client for forwarding applications and desktop screens. (linux, windows)

Conclusion

If you have a project to add, please let us know!