|diffusion tensor imaging (DTI) measurement of a human brain.|
All these other tools are substandard replacements for pieces of the above ecosystem of collaboration in a face-to-face manner. But let's take a look at some of them anyway.
One very interesting tools is Mind Mapping in a collaborative tool. Follow the rules of brainstroming and this tool may rock your next retrospective. MindMeister.com
Here's a list of tools for collaboration and many other things related to knowledge work.
One of my favorite tools is CardMeeting.com a virtual 3x5 card wall which allows concurrent creation of index cards and placement on the wall. Very useful for retrospectives with remote teams.