TestRail’s web-based test case management is used by thousands of great QA and Development teams to efficiently organize, track and manage software testing.
PractiTest - PractiTest is a cloud based Innovative test management tool.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Sauce Labs - Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Qase - Test case management software for QA and development teams that helps you make your product better.
Slack - A messaging app for teams who see through the Earth!