OK, it's almost 19.00 on a Friday night, and you're desperate to get the sound that a zebra makes. (Don't ask why, you just are, work with me on this!) Where do you go? I'll tell you, you go to FindSounds - Sound Types which is quite a funky little website. Along with the sounds of animals (including that zebra) you get hundreds of sounds. For example - there's not just one zebra sound, there are ten different ones. This is going to be zebra heaven for someone, you mark my words.
If you don't like zebras, try cannons, 19 different saxaphone sounds, if you want to get really gross, there's 24 vomit sounds, 200 different Star Trek sounds, Scooby Doo's laugh, and dozens of others. You can Tweet them, listen to similar sounds and email them. Lots of fun for a friday evening.