- CADET - The National Center for Accessible Media at WGBH (NCAM) has developed CADET (Caption and Description Editing Tool)
- Amara - Caption, subtitle, translate and review work
- Subtitle Edit - Open Source editor for video subtitles
- Aegisub - Cross platform open source tool, offers advanced options
Some of these sites will output the text as transcriptions.
Zoom, YouTube, Vimeo, Otter.ai and other options offer live transcription for web-based presentations and meetings. AI creates these; works best when audio is clear.