Write-on Video - The Video Editor for Storytellers. Create Storyboards, Edit Video, and Make an Impact.
Caption - Open-source captioning tool to help find the right subtitles.
Filma - Edit video like a pro easily and everywhere with your iPad
Ava - Making conversations accessible for the deaf
Velapp - Edit video as you shoot
Captioned - Say, show, share. Create a 60 second captioned video.