The Repast Suite is a family of free agent-based modeling libraries.
Java-based scientific graphics
Embeddable/J2E/Desktop Java Wiki CMS
An API for Java programmers to make test data
Function Point Analysis (FPA) with FreeMind
Adam - information management platform
Code generation from UML to any language (Java, Objective-C, PHP...)
Next generation web chess club
Scientific Computation and Visualization Environment
Sniffer and knowledge sharing tool for java platform
An open source spatio-temporal data mining library
A freeplane add-on for collaborative mind mapping
Web development IDE in browser, supports Java, ruby, javascript...etc
Search easily on local or remote files
Full featured open source BRM/BPM/CMS stack
A simple programmable spreadsheet for learning statistics.
Prototype editor for the SDEM Mapping Language
A web-based Laboratory Information Management System
GDuplicateFinder - A FREE Groovy way to find file duplicates!