Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.
Mate Translate - Ultimate translation app for Mac, iOS, Chrome and many more
DeepL Translator - DeepL Translator is a machine translator that currently supports 42 language combinations.
Crowdin - Localize your product in a seamless way
Lingva Translate - Lingva Translate is a language translation application that helps you to translate any language of the world to any language of your choice.
Apertium - To see the whole list of general documentation pages written in English, see documentation in English. Pour ceux qui sont plus à l'aise avec la langue française, une partie des pages anglaises a été traduite.