The free computer aided translation (CAT) tool for professionals
OmegaT is a free and open source multiplatform Computer Assisted Translation tool with fuzzy matching, translation memory, keyword search, glossaries, and translation leveraging into updated projects.
Colonize the New World.
FreeCol is an open version of Colonization. It is a Civilization-like game in which the player has to conquer the new world.
Free software tool for configuration and management IT asset database
CMDBuild is the most flexible software to configure a custom database of assets (CMDB stands for "Configuration and Data Base Management") and design related workflow processes. The purpose is to let operators have full control of the assets, knowing their composition, location, functional relations and the changes over time. CMDBuild allows you to design ITIL compliant workflows.
GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching geometry, algebra, statistics, and calculus. Download the free software at http://www.geogebra.org. Find the source code at http://www.geogebra.org/trac