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.

Fast screenshots with GIF and Twitter support.

GIPHY CAPTURE is the best way to create GIFs on your Mac. Simple, powerful, free, and easy enough for pretty much everyone and even a few small mammals.

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

The worlds most widely used web app scanner.

Built for developers and testers alike, SoapUI is the only open source tool that covers the entire testing spectrum (functional, security, load, mocking).