Screenshots » CompendiumNG. CompendiumNG allows to quickly create visual maps on a topic using nodes and links.
In this example different ideas regarding a problem are collected for assessment. It is possible to adjust the appearance of links and node labels. CompendiumNG allows you to add documents and pictures by dragging them into your maps. Download Windows » CompendiumNG. About CompendiumNG » CompendiumNG.
I used to be undecided, but now I'm not so sure. Compendium has been under development at the Open University for many years.
Compendium does much more than just Mind Mapping. It is a free and open source tool for representing, organising and communicating knowledge, processes and arguments. It may not be as pretty as some of the other mind mapping tools but it is much more capable and functional. There is one feature which was tried and found not to be useful but was not entirely removed. In one of the earlier versions there was an e-mail system built in to the program so that different users of the database could send each other messages, but this e-mail system did not connect to the outside world it was purely internal.