Node.js & Java development in Eclipse-based IDE
Log Viewer for log4j traces
Genealogy
Editor for Petri nets
Wacky Wheels Remake
A Tool for Qualitative and Quantitative Modeling of Gene Regulatory Ne
Metabolic pathways to Systems Biology standards (SBGN and SBML)
Open Source Pixel Editor
Split and Rejoin sprite sheets.
A music score editor
Web-based knowledge base template.
Free and Open Source Brainwave Entrainment application
Open source brainwave entrainment application
Metatagging Editor for Learning Object Metadata (IEEE's LOM)
Easy YGOPro puzzle editor
XML bindings and a GUI for creating and editing XBMC Scrapers
Simple and powerful File Editor for Android
Excellent Decision Table based Rules Engine implementation in Java