Draw vector graphics to scale using a descriptive language
Control to create diagrams in winform applications in C# (.NET)
Another drawing editor for LaTeX with PSTricks & TikZ
2D CAD for precise drawing
A modern digital design tool.
Qt Visual Graph Editor
2D CAD software
Growth-grammar related Interactive Modelling Platform
You can free remove background from image
aPhoto is a Batch Intuitive Program Makes Text and Image Watermarks
CUDA library for continuous optimization and light field analysis
(Free)Play multiple videos / images simultaneously on multiple screens
A graphical Finite State Machine (FSM) designer.
Universal CNC
Free image and chart digitizer
Free drawing software for Windows, Mac OS X, and Linux
Hand Written Equation Creator
A drawer for origami crease pattern