MystiQ
MystiQ is a free and open source powerful audio and video converter, graphical interface for FFmpeg
Curlew
Curlew is a free and open source easy-to-use audio and video converter for Linux
Totem
Totem is a free and open source, simple movie player for the GNOME desktop
Parole
Parole is a free and open source, modern simple media player for the Xfce graphics environment
ExMplayer
ExMplayer is a free and open source mediaplayer with 3D/2D video playback support, tools like audio converter,media cutter and audio extractor
Glide
Glide is a free and open source, simple and minimalistic media player
RecApp
RecApp is a free and open source, simple and user friendly app for recording desktop for Linux
Haruna
Haruna is a simple and customizable video player with the ability to play videos from YouTube and PeerTube. A free and open source program
traGtor
traGtor – free and open source audio and video file converter, GUI for FFmpeg
FreetuxTV
FreetuxTV – free and open source application for viewing and recording TV channels, listening to radio for Linux