Xmind - Xmind is a brainstorming and mind mapping application.
Mixed in Key - Mixed In Key is award-winning DJ software that gives you the #1 technique of the world's best...
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Tunebat - A browser based song key and bpm database. Supplies compatible songs for harmonic mixing.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
KeyFinder - Key estimation software for DJs