JaxoDraw: Feynman Diagrams made easy!
Another drawing editor for LaTeX with PSTricks & TikZ
A simple LaTeX {picture} drawing tool
Cross Platform GUI Toolkit
Vector drawing program for LaTeX using PSTricks
Simple and intuitive 2D vector drawing for electronics and not only.
Former project page
A graphical Finite State Machine (FSM) designer.
Font editor
Free drawing software for Windows, Mac OS X, and Linux
Create and edit SVG graphics directly in ownCloud. Based on svg-edit.
Open Source CAD
Vector based drawing software designed for RPGs