A cross-platform DVD authoring application
A free video editor to cut, filter, and encode projects
A GUI in C# .NET 4 for mkvextract (MKVToolNix)
A multimedia framework based on Qt and FFmpeg
Flipbook, Image Viewer and Audio-Video Player
The X Jack Video Monitor
it's a video player, also works for music and pictures
GOP-based video editor (remuxer)
Small tool to synchronize or mix two subtitles files.
a filemanager written to help managing movie files and video clips
Anime4K implemented in C#
Video mixer for mixing live and recorded video and audio feeds
MP4Tools is a collection of free tools to manipulate MP4 files
Graphic Live Mixer
Set the vlc media library (ml.xspf)
Calyp is an open-source raw video player for image/video analysis