FlightGear Flight Simulator: free open-source multiplatform flight sim
A batch image converter and resizer
Open Source Solid Modeling CAD
3D modeler, 3D game maker, 3D demo maker
Pencil2D is a cross-platform animation/drawing application.
Extended emulation of metalic gear toy, creates curved line designs.
A small C library for building user interfaces with C, XML and CSS.
Free yourself
3D Engine technology with partial tools developing kit.
Downloader for map tiles