pinup - Pinup.com is quick and easy to take sticky notes and share with your friends. It's Simple to use.
Xmind - Xmind is a brainstorming and mind mapping application.
Sticky Notes - Sticky Notes is an integrated feature of adding notes in the Windows operating systems.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Lucidspark Online Sticky Notes - Lucidspark Online Sticky Notes provides teams with a full-screen canvas to create notes, discuss thoughts, share experiences, or initiate voting to reach a suitable decision.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.