JaxoDraw: Feynman Diagrams made easy!
Cross Platform GUI Toolkit
HARFANG 3D source code public repository
3D .NET engine for Windows, Linux, Mac
Cross-platform application for digital painting
A Lightweighted Toolkit For Volume Rendering
AMOS BASIC reimplementation in Java
Community Supported Eclipse Visual Editor
Simple Image Viewer using Java's built-in image handling functions.
This code has been moved to GitHub