Charles is a HTTP proxy that enables you to see traffic between your machine and the backend

Sonic is a platform that integrates remote control debugging and automated testing of mobile devices, and strives to create a better user experience for global developers and test engineers.

Exploratory testing assistant for Chrome and Firefox. Adds common problematic values and edge cases to the context menu (right-click) for editable elements, so you can keep them handy and access them easily during exploratory testing sessions.

Instantly create and refine mind maps with AI Chat. Supercharge your creative and productive workflow.

A browser extension and Ruby gem to improve the debugging experience when testing Rails applications

Professional software tool for HTTP testing and debugging