Gesturefy - Customizable mouse gesture addon, which supports over 40 different actions. Features:
Visual Understanding Environment - Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool.
Easystroke - Easystroke is a gesture-recognition application for X11.
Flying Logic - Highly visual software for planning support used by strategists, process improvement specialists, teachers, and writers. Windows, Mac OS X, and Linux.
Strokeit - StrokeIt is an advanced mouse gesture recognition engine and command processor.
ThinkComposer - Software for create adaptable and multilevel diagrams, concept maps, mind maps and models