The open source embeddable online markdown editor (component)
A PlantUML editor written in Qt4
Cress is a comprehensive toolset for graphical service/workflow design
Jade is a cross-platform diagram editor built on the Qt framework.
Free drawing software for Windows, Mac OS X, and Linux
Computer vision workbench
Generic textile / knot diagram / thread topology editor
It`s Open Source Project That Contains Huge SDK`S Inside It.
The HTML 5 JavaScript diagramming library
An Eclipse plug-in for the IBM FileNet P8 Content Engine and CMIS
Business graphics diagramming application + customizable shape lib.
Easy Video Editor - graphical interface to non-linear video editor
A free, easy-to-use and user-friendly Java-based UML editor.