-- downloads under Creative Commons license. They are free and legal, and downloaded files may be shared freely, but use for commercial purposes and alterations of any kind are prohibited if not explicitely expressed otherwise in specific cases. Also make sure that all files are attributed to "Farblos" when you share them. 

DJs please note:
Farblos does not consider it "commercial" if songs are played in clubs and on (online) radio stations, so feel free to do so (but a short notice would be nice).