I use my spare time to develop on an open source game called phpRPG. It is a web-based multiplayer roleplaying game, released under GPL.
I typed a whole lot until the browser crashed. :( So I will tell you more if I come back again.
FOAF updates: Trust rankings are now exported, making the data available to other users and websites. An external FOAF URI has been added, allowing users to link to an additional FOAF file.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!