Bubbl.us allows users to to create mind mapping and brainstorming diagrams online.
Free account includes:
Up to 3 mind maps
Save to image or HTML
Share mind maps
Email support
Coggle is a freeware mind-mapping web application. Like other mind-mapping software, Coggle produces hierarchically structured documents, like a branching tree.
Unlimited public diagrams
Real-time collaboration
Unlimited image uploads
PDF & Image download
Export as .mm and text
Comments & Chat
FreeMind is a premier free mind-mapping software written in Java to be downloaded on your computer. The Java makes it really flexible to use.
Create, share and collaboratively work on mind maps with MindMeister. Includes apps for iPhone, iPad and Android. Free version includes up to 3 mind maps.
Millions of people use XMind to clarify thinking, manage complex information, run brainstorming and get work organized. XMind is an open source project, which means it's free to download and free to use forever. XMind Plus/Pro with more professional features are also available.
Free Version includes:
All kind of diagrams
New Themes and Fonts(NEW)
Mind Toolbox
Save to Evernote
Share on Web