Xmind - Xmind is a brainstorming and mind mapping application.
LeoCAD - LeoCAD is a CAD program for creating virtual LEGO models.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
LDraw - LDraw is an open standard for LEGO CAD programs that allow the user to create virtual LEGO models...
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
LDCad - LDCad is a multiplatform ...