I'm a programmer, not a musician, so maybe everyone else knows about that site already. Anyway, I found this awesome website with indie music
http://www.indiegamemusic.com , the great thing about it is the search feature.
It is actually designed for developers. I have seen several other, bigger and more popular, sites like this and got depressed, because of the prohibitive time cost of searching it (in these other sites it always felt like I would die out of old age before I find anything). Also, it has surprisingly good quality music (hard to find there any really bad music, everything is average quality or above).
If you are a musician, I STRONGLY recommend you to register at that site. That's the kind of site where we, developers, look for music to our games.
BTW, it would be nice if someone created some topic with guidelines/FAQ to developers (not musicians) about finding music and sounds to our games and sticky it. It would be helpful, since not everyone here is knowlegable about music, while everyone needs it at some point of the production stage