Everyone is privy to the joys of mobile music the intersection of phones and MP3 players has afforded consumers the opportunity to carry around audible entertainment with more ease than ever before. But beyond the standard, owner-loaded music playing apps and the glitzy marquee streaming serves, there exists a level of essential music applications that are polished, functional, and most importantly, free. These five apps offer auxiliary features to foster discovery and incentivize use. If youre a casual listener, or you just like to discover new things with minimal effort, these apps are an essential addition to your collection.

...get all 5 over at the MLS blog...