Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
GoldenDict - The program has the following features: Use of WebKit for an accurate articles' representation, complete with all formatting, colors, images and links.
Crowdin - Localize your product in a seamless way
DeepL Translator - DeepL Translator is a machine translator that currently supports 42 language combinations.
Weblate - Weblate is a free web-based translation management system.