Diffblue Cover uses next generation autonomous AI to automate unit testing so that Java development teams can build better applications faster.

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

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Claude Code superpowers: core skills library

Playwright enables reliable end-to-end testing for modern web apps.

Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.