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Picard is the next generation MusicBrainz tagging application. This new tagging concept is album oriented, as opposed to track/file oriented like the ClassicTagger was. Picard is written in Python, which is a cross-platform language, and makes use of cross-platform libraries - this allows the same code to run both on Windows, Linux and Mac OS X.

Beets is the media library management system for obsessive-compulsive music geeks. The purpose of beets is to get your music collection right once and for all. It catalogs your collection, automatically improving its metadata as it goes using the MusicBrainz database. It then provides a bouquet of tools for manipulating and accessing your music.

freedb is a free CD and music data base service to look up textual metadata about music, audio or data CDs. This is done by a client which queries the freedb database. As a result, the client displays the artist, CD title, track list and some additional information. Clients are for example CD player, CD ripper and CD burn software. Freedb does not offer clients.

Meta is a complete tool that helps you manage your digital music collection. It allows for easily editing audio metadata (tags) such as a song's artist, title, album, artwork, etc…

Demlo organizes your music library automatically and dynamically. It runs a chain of user-defined scripts using variables such as tags and file properties. This way it yields virtually unlimited customization power to the user.

ACRCloud provides best audio fingerprinting services for companies and developers to build ACR ( Automatic Content Recognition ) abilities such as audios and videos recognition, broadcast monitoring ( music / ads ) , live TV channel detection, copyright detection and so on.