Transifex - Transifex makes it easy to collect, translate and deliver digital content, web and mobile apps in multiple languages. Localization for agile teams.
Localazy - Forget all the hassle and make your app available in 80+ languages with the translation platform built for app developers.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.
Poedit - Poedit translations editor. The best way to translate apps and sites.
Crowdin - Localize your product in a seamless way