Vitomu
Vitomu is a free and open source, easy-to-use converter of YouTube videos to various audio formats
Winds
Winds is a free and open source RSS aggregator, a software for searching and listening to podcasts
LosslessCut
LosslessCut – free and open source, simple and ultra fast cross platform tool for lossless trimming/cutting of video and audio files
Streamtuner2
Streamtuner2 is a free and open source GUI directory browser for internet radio, audio and video streams
Puddletag
Puddletag is a free and open source, powerful yet simple audio tag editor for Linux
Shutter Encoder
Shutter Encoder is a free and open source video converter, image and audio handles tool
Musictube
Musictube is a free and open source program to listen to music/songs from YouTube
MPlayer
MPlayer – free and open source, cross-platform media player
QMPlay2
QMPlay2 – free and open source, multiplatform video and audio player which can play most formats and codecs
Celluloid
Celluloid – free and open source, simple media player that can play virtually all video and audio formats, GTK+ frontend for mpv