Seventh Sanctum a site of random tools for creativity and more!
They have a collection of 'generators' that make random characters, plots, ideas to use in your writing. Plus it can just be fun.
Behind the Name is a random name generator.
Fake Word Generator - Something every fantasy writer should have in their bag of tricks.
TV Tropes is a catalog of the tricks of the trade for writing fiction. Warning: It can be a real time waster but it is a fun site.
Build your hero/heroine - Okay, it is a bit of a time waster, but pretty fun.
Urban Dictionary - This is another great time waster. Interesting and fun.