EZlib is an MP3 Music Library/Playlist Manager with built-in MP3 Player - Windows Freeware. EZlib is a Free MP3 Music Library and Playlist Manager Features: (1) Custom-Query on 14 ID3v2 tag fields and file dates (2) Single and mass ID3v2 tag update (3) Four user-defined, custom ID3v2 tag fields (4) Four user-defined music rating fields plus tempo (5) Pictures (add/delete/display) (6) Automatic lyrics search (7) Playlist creation and maintenance (8) Playlist tweaking at runtime (9) Songwriter's aid (10) Rename music files to match ID3v2 tag fields (11) Rename music files with a numeric prefix for CD writing in playlist order (12) Print functions (13) Built-in, high quality MP3 player (14) Small and fast