Nifty - Manage projects, work, and communications in one place.
Postman - The Collaboration Platform for API Development
Intercom on Product Management - The ultimate resource for aspiring product managers
Sauce Labs - Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.
Party Line - Use Slack to manage your projects
TestComplete - TestComplete Desktop, Web, and Mobile helps you create repeatable and accurate automated tests across multiple devices, platforms, and environments easily and quickly.