butterflow-ui - butterflow-ui is a graphical front end for interacting with the butterflow command line application...
Kinovea - Kinovea is a video player for sport analysis
Slow Motion Video FX - Slow down your videos with a single click. Adjust speed, zoom in, slow down a certain part of your video. Even speed up. All online, no account required
PhysMo - PhysMo is an open-source (free!
LongoMatch - Real-time and post-recording sports video analysis software.
Slow Motion Camera - Slow Motion Camera is a video-editing app that allows you to edit your videos by changing their playback speed.