JaxoDraw: Feynman Diagrams made easy!
Download, save and convert multiple subtitles from YouTube videos
Image viewer used for sorting and other utilities
Open Source Solid Modeling CAD
Full featured MUD server with all the trimmings.
Xj3D is an open-source Java codebase for the X3D Graphics standard.
Another drawing editor for LaTeX with PSTricks & TikZ
Multi-Tabbed and Multi-Layered Paint program with a rich tool set.
Jiddu Krishnamurti's Book of Life|Libro de la Vida
Java Audio Plugin System
FLAC decoder for Java 8
Fileaxy does file sync, de-duplication, image matching & bulk preview
Modular XSL-FO Implementation for Java.
Application which detects musical notes from the microphone.
X3D is the open-standard format for 3D graphics scenes on the Web.
Java3d scenegraph editor
ProStack - a platform for image processing and analysis
Treebolic hyperbolic visualization for WordNet