The Work Nickname Generator and Nameboy

In the useless name generator category, there is the Work Nickname Generator, which tells you what your coworkers call you behind your back. In the useful name generator category, there is Nameboy, which will help you find an available name for your new site.

Update (2/16/05): it looks like the Work Nickname Generator no longer exists. Nameboy, on the other hand, is still around and as useful as ever.