xfce4-systemload-plugin displays current CPU load, memory in use, network utilization, swap space, and system uptime in xfce4-panel.
Xfce4-systemload-plugin documentation
See NEWS for details on changes and fixes made in the current release.
Xfce4-systemload-plugin source code
Xfce4-systemload-plugin archive or Xfce4-systemload-plugin tags
From source code repository:
% cd xfce4-systemload-plugin
% ./autogen.sh
% make
% make install
From release tarball:
% tar xf xfce4-systemload-plugin-<version>.tar.bz2
% cd xfce4-systemload-plugin-<version>
% ./configure
% make
% make install
Visit the reporting bugs page to view currently open bug reports and instructions on reporting new bugs or submitting bugfixes.