archive.org really tries to archive as much information and culture as possible. It's very easy for them to do with public domain, open source, and similar things (there are even "abandonware" games, which were originally commercial games, but have since been abandoned by the publisher). They do occasionally run into issues when someone claims copyright on what they've added, and they're currently in litigation over some books they've uploaded.
For the most part, however, they have some really good things!
oh so those songs werent uploaded by you? O.O i was curious about that part