Quality Multilingual Recordings
http://www.rhinospike.com/ houses over 20,000 recordings of natives in over 60 languages!
This can be very helpful if you don't know how the sound system works or if you don't have a specific recording. Try it out next time you need pronunciation practice :)
Also, if you are really intense, I recommend you not only learn basic pronunciation guide features, but the International Phonetic Alphabet (IPA) and its extensions, which features all the sounds you will hear in any language of any popularity. It is pretty large and not the easiest, as sounds can be difficult to distinguish, but, if you learn it well, it will help your language learning a lot and give you a better understanding of linguistics.
Note: Google Translate and Wikimedia sites have surprisingly good pronunciation too, so you can use those when all else fails.
There's also http://www.forvo.com/ with "2,192,845 words 2,274,235 pronunciations 306 languages".
This is helpful for learning IPA sounds: http://web.uvic.ca/ling/resources/ipa/charts/IPAlab/IPAlab.htm
And this is helpful for typing IPA: http://westonruter.github.io/ipa-chart/keyboard/
I was actually going to edit in Forvo, thanks for mentioning it for me! Those IPA sites should be very helpful too :)