EZlib is a Free MP3 Music Library/Playlist Manager written in assembly Language, with a front-end Title/Artist search which can be used to build a more refined working list of songs. Other features: single and mass ID3v2 Tag Updating, 4 user-defined custom ID3v2 fields, runtime Playlist tweaking, searching inside lyrics & comments ID3v2 tag fields, print library, playlists and lyrics, 4 music rating fields and tempo, and a built-in player.