Tolgee - We are saving developers time providing tool for Web application Localization
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Tranzlate - Localization made easier.
Crowdin - Localize your product in a seamless way
LingoHub - Easy software localization for web and mobile apps
Weblate - Weblate is a free web-based translation management system.