Forvo

Forvo's catchphrase is "All the words in the world. Pronounced." With well over a million words and counting they're getting there; it can be fascinating to see a crowd-sourced project like this develop. While the site works well as a pronunciation tool, it isn't a translator. For example, when you look up the word "cat," you'll see many examples of how to pronounce the word "cat" in English. However, there aren't links to the pronunciation of cat's translation in French, Spanish, or any other language. You can hear how "cat" sounds in a handful of different accents, though, which can be interesting and amusing. One of the site's best features is that you can hear different voices saying the same word -– this really helps to give you a sense of the "best" way to say it yourself. It's worth noting that the sound quality varies from recording to recording; some are very clear while others are muted, distorted, or totally unintelligible.