A batch image converter and resizer
Zoomable user interface (ZUI) with file manager, file viewers and more
Video/audio converter/transcoder/player in File Explorer mouse menu
Fancy interactive fluid simulation for gfx fans, VJs and demo coders
Free music notation & composition software
Light Alloy is a media player for Windows
Image viewer and organizer
Simplified 3D Model Editor, Suitable For Beginners
Heimer is a simple cross-platform mind map tool written in Qt.