Zubtitle - Zubtitle is an online tool that makes it easy to add captions to any video.
VEED Subtitle - A simple & fast way to add subtitles to your videos online
Tactiq - Meeting notes powered by speech to text transcription
Subtly - Learn English with smart subtitles on movies and TV shows
Ava - Making conversations accessible for the deaf
Caption - Open-source captioning tool to help find the right subtitles.