The Apache JMeter™ application is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.

Best "simple" screen capturing app (Mac and Windows) because it creates animated gifs that attach to bugs easily. Simple because it works a lot like snippy to capture screen areas

SeleniumBase Case Plans is Test Case Management Software that uses Markdown tables for displaying test plans directly in GitHub (and other source code management systems that support Markdown format).

Tether is a bug reporting tool for teams. With Tether, teams can report bugs directly on any website using our screenshot and recording tools. Teams can manage feedback from their Tether dashboard or push the feedback anywhere via our integrations.

The worlds most widely used web app scanner.

k6 Open Source is designed for load testing. Extensible to support other types of testing.