Demlo

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.

It is free and open source, powered by Lua and FFmpeg.

Features:

• Internet tagging (MusicBrainz).
• Programmable tagging.
• Chainable user scripts.
• Case checking (with customizable list of exceptions).
• Dynamic transcoding.
• Automatically remove embedded covers.
• Only keep covers of a certain quality.
• Fetch cover from MusicBrainz.
• Batch process an entire library at once.
• Manage as many libraries as desired.
• Renaming.