Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

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.

Synonymful - Improve your vocabulary and communicate like a pro.

Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.

Fluent - Fluent is a people-based marketing platform that uses real-time, one-to-one interaction to create custom audiences and serve personalized ads that drive performance at scale.

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.