Mantissa is a collection of various mathematical algorithms in Java aimed towards simulation. It features a small set of linear algebra classes, a least squares estimator, some curve fitting classes, several ordinary differential equation integrators (all supporting multiple switching functions and dense output), vectors and rotations in a three dimensional space, algebra-related classes like rational and double polynomials, various orthogonal polynomials, some optimization algorithms using direct search methods, and more.
Jarmor (Java ASCII Armor) is a tiny collection of stream filters which implement ASCII armors. They can be used to convert streams of binary data into text and vice-versa. For example, it can be used to transfer or store data using text-only means like mail or XML. The supported encodings are Base64, Base32, Base16, UUCP, and ASCII85.