Xmind - Xmind is a brainstorming and mind mapping application.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

Outbound Apps by Intercom - Embed apps right inside your messages

Coggle - Coggle is a simple, beautiful, powerful way of structuring information.

Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors