The Data Generators from Rudy Velthuis' Delphi Big Numbers library.
The original data generator for BigIntegers was written in C#.NET, but there are newer ones for all three written in Java.
Java versions:
- BigDecimals: Test data generator in Java; open with NetBeans 8
- BigIntegers: Newer test data generator in Java; open with NetBeans 8
- BigRationals: Test data generator in Java, using the Apache Commons-Math library. Open with NetBeans 8. Might require installation of the Apache libs.
C#.NET versions:
- BigIntegers: Test data generator in C#; open .sln file with Visual Studio 2010 (Express) or newer