it means FOR TWO and indicates the collaborative character of mind42. Manage all your ideas, whether alone, twosome or working together with the whole world - collaborative, browser-based and for free.
"Use Webspiration to map out ideas, organize with outlines and collaborate online with teams or colleagues. Webspiration unleashes your creativity, strengthens organizational skills, and transforms your ideas and information into knowledge."
SpiderScribe is an online mind mapping and brainstorming tool. It lets you organize your ideas by connecting notes, files, calendar events, etc. in free-form maps. You can collaborate and share those maps online.
Pearltrees lets you keep at hand all the great contents you find everyday on the web, but the game goes beyond that! This is an organization web. * Recommended by Dave Warlick.
Creaza offers you an integrated, web-based toolbox for creative work, both at school and in your free time. You use the toolbox along with various fully developed thematic universes: historical periods, fairy-tales, fantasy worlds, and current challenges, such as climate/environment.
With Thinkature, you can create a collaborative workspace and invite coworkers, friends, and colleagues to join you in just seconds. Once inside your workspace, you can communicate by chatting, drawing, creating cards, and adding content from around the Internet. It's all synchronous, too - no need to hit reload or get an editing lock.