Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

Design, debug, and test APIs locally or in the cloud

Automate front-end software testing with a single sentence.

Clippy lets you run a variety of large language models (LLMs) locally on your computer while sticking with a user interface of the 1990s. It's a love letter and homage to the late, great Clippy - and the visual design created by Microsoft in that era.

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.

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