untrunc - Restore a truncated mp4/mov. Improved version of ponchio/untrunc
Typatone - Make music while you write
Restore.Media - Got a corrupted video or audio file? No worries – Restore.Media can repair even the most severely damaged video and audio files where other tools fail. Try it free!
Frettable - Play your instrument and AI will write the sheet music
Digital Video Repair - Digital Video Repair is freeware to repair (fix) MP4, MOV and AVI files having problems with playback or rewinding.
Tab Lab - Read and write music notation and tablature, together.