Visual Understanding Environment - Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool.
MySQL - The world's most popular open source database
Flying Logic - Highly visual software for planning support used by strategists, process improvement specialists, teachers, and writers. Windows, Mac OS X, and Linux.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
FreeMind - FreeMind is a premier free mind-mapping software written in Java.
SQLite - SQLite Home Page