Sweet Home 3D is a free interior design application
Densifye
A PDF optimizer
OcenAudio
Easy, fast and powerful audio editor
OpenSCAD
The Programmers Solid 3D CAD Modeller
qStopMotion
qStopMotion is a fork of stopmotion for Linux.
Video Trimmer
Video Trimmer cuts out a fragment of a video given the start and end timestamps. The video is never re-encoded, so the process is very fast and does not reduce the video quality.
LeoCad
Design virtual models you can build with LEGO® bricks
AzPainter
AzPainter is a 16-bit color paint software for drawing illustrations. It’s not suitable for dot editing.
RawTherapee
RawTherapee is a free, cross-platform raw image processing program
Image Mosaic Wall
This application allows you to create an image based on a bunch of other images. It looks like a mosaic effect.