Draw vector graphics to scale using a descriptive language
A ZX Spectrum UDG creator
Cross Platform GUI Toolkit
Just a simple flat design vector based character designer.
Free yourself
Advanced image processing toolbox for Scilab on Unix/Linux/Mac OS
Free drawing software for Windows, Mac OS X, and Linux
Sprite builder for BlueBox Image.
Hand Written Equation Creator
Modification of the graphics program GIMP to replicate Photoshop feel
Open Source CAD