Music organizer: easily handles all popular digital audio files tags formats. It can fix tags using freedb, import amazon.com info, get data from files/folders names, keep files and folders organized, create play lists, export tags data, etc.
AudioShell is a freeware MS Windows Explorer shell extension plugin which allows you to view and edit music file tags directly in Windows Explorer. AudioShell supports MP3, WMA, Apple iTunes AAC/M4A/M4P, MP4, MPC, Monkey's Audio, OGG and FLAC files.
Audio Files GDS Indexer is a Google Desktop Search plugin which allow it to index all popular audio files formats, it support MP3, WMA, ASF, WMV, Apple iTunes AAC (M4A and M4P), MP4, OGG, FLAC, MPC, Monkey's Audio, WAV Pack, Optim Frog.