Open-Source-Software
Open Source alternative to Google Analytics: http://piwik.org/
(Didn't test it yet, though)
The Open Document Format is the file format for electronic office documents. It is standardized as ISO/IEC 26300. Implementors include OpenOffice.org and KOffice.
CrypTool, ein Lernprogramm für Kryptographie. Derzeit leider nur für Windows. Version 2.0 soll eine in Java geschriebene Multiplattformanwendung werden.