Bad Panda Records is a must : https://soundcloud.com/bad-panda-records
They’re putting out a new track from a different artist every monday since years now by musicians from every angle of the world with a great eclectic taste and helped some acts to break (think of RocketNumberNine now on Four Tet’ label, Pick a Piper from Caribou live-band, Anders Ilar and many others)
Then i would obviously suggest the free music archive and archive.org
