Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.

Phrase - A platform offering AI-powered translation tools for localization at scale.

Transifex - Transifex makes it easy to collect, translate and deliver digital content, web and mobile apps in multiple languages. Localization for agile teams.

memoQ server - memoQ server is a full-fledged translation management system (TMS) used by enterprises and translation companies all over the world.

POEditor - The translation and localization management platform that's easy to use *and* affordable!

Smartling - Website localization & translation