Features: - Extensive tag functions - Flexible copy/move/rename file operations - Intelligent tagging using smart tags - Freedb support for online search and automatic tagging - Ergonomic design and smart handling - Various browsing modes - Recursive directory scans - Active color marking - Preview and rollback of changes - MP3 player support All features are described here in details: http://www.initware.com/qTag.html
Platforms supported:
Windows NT, Windows 2000, Windows XP, Windows 98, Windows ME

Benefits of registration:
qTag is able to tag and manage big amounts of mp3 files. It is easy to use, is reliable and fast and has a nice user interface.