There are probably other sites that do this now, but I've used WhatTheFont in the past and it's been very good:
WhatTheFont! « MyFonts
They also have a mobile version so that you can snap any sign, display, etc. and figure out the font it uses:
WhatTheFont Mobile: Overview « MyFonts
Dafont. End Transmission.
If you like the crappiest fonts known to man, sure. If you like quality, there a tons of better places to source free fonts.
Where exactly? I need some good, thick fonts for stuff I'm doing.
Recommendations?