I like freepedia.
How about open dictionary?
Discussion
I suppose that is also good as an idea. But I was specifically thinking of an urbandictionary ripoff version lol
Now that urbandictionary is so well known, we can probably shift away from "dictionary" which makes the naming very hard and people will probably get it and will definitely get it once someone explains it and won't put up much if any resistance. So....
UrbanFree
FreeUrban
?