Wargames and military history

• Wargamer.com: A central website for all the content related to wargames.
   

• List of naval battles: List and comments of some naval battles.
   

• Ancient Greek Naval Warfare: A page with some insightful comments and pics related to greek tactics.
   

• The Catalan Wargames Resource: Information of strategy games (both boardgames and computer games) in catalan, occitan, spanish and english.

Programming

• SDL: Simple DirectMedia Layer is a cross-platform multimedia library.
   

• ClanLib: A great games library, used in the development of Galley Battles.
   

• SourceForge: Free Software and open source projects.