Localizer - Free self-hosted open-source crowd-translating service
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
Lingvanex - Translation apps for business, travels, professional translators, students and free style people.
Ludwig.guru - Linguistic search engine and contextualized translator. The final solution for your writing doubts!
Typewise - The next generation keyboard