SmartDraw - Instead of starting with a blank screen, SmartDraw gives you the exact template you need.
Xmind - Xmind is a brainstorming and mind mapping application.
Creately - The new interface for work to ideate, plan, and execute
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.