A free, cross-platform open source tool for creating and modifying subtitles
A multimedia file converter
Edit audio file metadata
Editor for text-based subtitles
Video subtitling for the GNOME desktop
Video Editor
Matroska files creator and tools
Convenient unified display of the most relevant technical and tag data for video and audio files
Create, playback, and print sheet music for free
MusicBrainz's music tagger
An easy to use, quick to learn, and surprisingly powerful video editor
Create and edit your own movies
Video editor
Convert audio files
GTK+3 tool to edit subtitles for GNU/Linux/*BSD
Easy to use audio and video transcoding application
Media Cutter + Joiner