Gesturefy - Customizable mouse gesture addon, which supports over 40 different actions. Features:
Xmind - Xmind is a brainstorming and mind mapping application.
Easystroke - Easystroke is a gesture-recognition application for X11.
Visual Understanding Environment - Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool.
Strokeit - StrokeIt is an advanced mouse gesture recognition engine and command processor.
FreeMind - FreeMind is a premier free mind-mapping software written in Java.