Xmind - Xmind is a brainstorming and mind mapping application.
Workona - A better way to work in the browser.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
Session Buddy - Manage Your Browser Sessions