Crowdin - Localize your product in a seamless way
Amazon Mechanical Turk - The online market place for work.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Universal Data Tool - Machine learning, data labeling tool, computer vision, annotate-images, classification, dataset
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.
Labelbox - Build computer vision products for the real world