Mate Translate - Ultimate translation app for Mac, iOS, Chrome and many more
Subtitles Downloader by Checksub - Sometimes you may want to export or edit the subtitling of Youtube videos that you have uploaded or that you're fans of.
Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.
iTranslate - No training needed. Just start speaking and iTranslate recognizes your voice, converts your words to text and translates them into another language.
Stepes - On-demand chat based translation app
Captionfy.io - Captionfy is a free Youtube community captions platform with a subtitles/captions editor that you can use to create captions for any public Youtube video.