Acorn

bubbl.us

comapping.com

Comapping is a collaborative web-based mind mapping tool that is transforming traditional mind mapping techniques into a user-friendly web 2.0 application. Key features and benefits include instant updates, real-time collaboration, and auto-layout technology that optimizes the use of screen real estate.

Kayuda

Kayuda is a web-based visual wiki, a mind-mapping tool, and a non-linear writing tool that allows you to track ideas and the relationships between them. It’s free, and any number of people can collaborate simultaneously in real-time. You can have any number of wikis (called workspaces), and you can choose how private to make them.

Mapul

Mpaul is an online mind mapping tool.

Mind42

Mind42 is an online mind mapping tool.

MindMeister

MindMeister is a free web 2.0 application comparable to Google Docs or Spreadsheets that enables users to create, manage and share mind maps online and access them anytime, from anywhere. In brainstorming mode, fellow MindMeisters from around the world (or just in different rooms) can simultaneously work on the same mind map — and see each other’s changes as they happen. Using integrated Skype calls, they can throw around new ideas and put them down on “paper” at the same time. Maps can be imported from and exported to standard desktop mind mapping applications such as MindManager and FreeMind, or even as a document outline or image file. Community features such as tagging and change notifications (also via Twitter) make MindMeister all the more useful for global collaboration. All you need is a standard web browser — no plugins or additional software required.

Mindomo

Mindomo is a versatile Web-based mind mapping tool, delivering the capabilities of desktop mind mapping software in a Web browser — with no complex software to install or maintain. Create, edit mind maps, and share them with your colleagues or your friends.