FreeMind : FreeMind is a premier free mind-mapping software written in Java.
Visual Understanding Environment : The Visual Understanding Environment (VUE) is an Open Source project based at Tufts University. The VUE project is focused on creating flexible tools ...
Conzilla : Conzilla2 - our second generation concept browser - is a knowledge management tool with many purposes.
TheBrain : TheBrain is a mind mapping and personal knowledge base software
WikkaWiki : WikkaWiki is a flexible, standards-compliant and lightweight wiki engine written in PHP, which uses MySQL to store pages.
The IHMC CmapTools program empowers users to construct, navigate, share and criticize knowledge models represented as concept maps.