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

Robotium is an Android test automation framework that has full support for native and hybrid applications.

Supercharge team collaboration by sharing screen capture, logs, and debugging information from local development.

A super fast way to QA. Browser extension for capturing and reporting bugs 20x faster. A screen capture tool.

Hoppscotch is an open-source API development ecosystem that helps you create and test your API requests saving precious time in development.

For those more detailed screen recordings like demos as well as bugs. Has a built in editor.