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Debian Linux / Wiki
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GNU's Not Unix
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Linux Kernel Archives
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X.Org Foundation / Radeon Feature
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Python Programming Language / PythonCard
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HTML
CSS
JavaScript
Hacks
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Apache Software Foundation / Doc 2.4
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MySQL 5.5 Reference Manual
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Mailman, the GNU Mailing List Manager
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Samba - opening windows to a wider world
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Bacula® - die Open Source Netzwerk-Backup-Lösung
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SelfHTML Wiki
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The W3C Markup Validation Service
- MPlayer - The Movie Player
- World Chess Federation (FIDE)
- European Chess Union (ECU)
- Deutscher Schachbund / Bundesliga
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Schachbund Nordrhein-Westfalen
- Schachverband Mittelrhein / Regionalliga
- Kölner Schachverband
- Internationaler Schachverein Freibauer Eikamp'78
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Schachverein Horrem 1948
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lichess.org
- Syzygy endgame tablebases
- Chessbase News
- Schachwelt
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ChessVibes
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Ideachess
Karte - Verkehr.NRW
OpenStreetMap: Die freie Wiki-Weltkarte
Xing
