Weka4OC: Weka for Overlapping Clustering is a GUI extending WEKA
clustering, machine learning, algorithms
command line sort utility
Open source library for processing arrays and matrices
Math Parser for Java
PAK is a collection of library code to handle the overhead of coding
Programming Game, A Practice Tool for Building Intelligent Things
BinBase is a software for the automatic analysis of Massspec data from
combinational logic functions minimization
Robotypo Web app hosts battles between robots - simple Java programs.
A CLI text encrypting/ciphering program and library for java
Spatial extension for db4o.
Offers Random numbers API for your programs written in Java.
NTRUEncrypt and NTRUSign in Java