The following Mind Map Resources have a General Public L:icense or Educational Community License

http://compendium.open.ac.uk/institute/ COMPENDIUM	Compendium is about sharing ideas, creating artifacts, making things together, and breaking down the boundaries between dialogue, artifact, knowledge, and data
http://freemind.sourceforge.net/wiki/index.php/Main_Page FREEMIND	FreeMind is a premier free mind-mapping  software written in Java. The recent development has hopefully turned it into high productivity tool.
http://wikkawiki.org/HomePage WIKKAWIKI	WikkaWiki is a flexible, standards-compliantand lightweightwiki engine written in PHP, which uses MySQL to store pages. Forked from WakkaWiki. Designed for speed, extensibility, and security. Released under the GPL license.
http://vue.tufts.edu/about/index.cfm VUE	At its core, the Visual Understanding Environment (VUE) is a concept and content mapping application, developed to support teaching, learning.Using a simple set of tools and a basic visual grammar consisting of nodes and links, faculty and students can map relationships between concepts, ideas and digital content.