POEditor - The translation and localization management platform that's easy to use *and* affordable!
Turnitin - Turnitin is preferred by educational institutions around the world for preventing plagiarism. Instructors at all levels of education can request that students use the service to submit papers, and Turnitin checks those papers for plagiarism.
Crowdin - Localize your product in a seamless way
Unicheck - The plagiarism checker Unplag scans across the internet, repositories, open sources content and databases. It delivers real-time results and has no cached data.
Weblate - Weblate is a free web-based translation management system.
PlagScan - The Internet makes plagiarism a bigger problem than ever.