libmp4tag 1.2.13 An MP4 tagging library where all tags can be accessed and modified and any tags, unknown tags or custom tags are never lost when the audio file is updated. A list of known tags is only used when new tags are added. Oggify 2.0.7 Oggify is a command-line tool to convert between different audio formats. It's foremost intended to manage OGG Vorbis based collections, but also supports FLAC, or MP3 for older players, ALAC and MP4 on Mac OS X.