Postman - The Collaboration Platform for API Development
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Sauce Labs - Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.
iMocha - Make intelligent talent decisions.
TestComplete - TestComplete Desktop, Web, and Mobile helps you create repeatable and accurate automated tests across multiple devices, platforms, and environments easily and quickly.
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.