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.
Inspector Spacetime from Google - Google Translate for engineers working with motion
Lingvanex - Translation apps for business, travels, professional translators, students and free style people.
Gengo - People-powered translation at scale.
iTranslate - No training needed. Just start speaking and iTranslate recognizes your voice, converts your words to text and translates them into another language.