Expenso – Online Mapping Tool
http://en.ekpenso.com/

Ekpenso.com is an online mindmapping tool. Create and share your mindmaps. Ekpenso.com offers the ability to edit your mindmaps even when you are offline. There is a google gears and a Adobe-air version. Features include: a) Create and share mindmaps online; b) Make mindmaps public or share them with groups or make them public; c) Export maps to XML, PDF, image or Freemind-files; and d) Use ekpenso offline: Edit mindmaps offline via Gears or Adobe AIR. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.