Screenshot testing library for Android.

Free and open source. Solve accessibility issues before they reach your customers.

Checks web UI for browser compatibility (Compliance with Can I Use?)

YATTIE exists to help make tester's lives easier. Ideally, it should remove friction from the exploratory testing process - everywhere from gathering evidence to submitting reports.

An open source JS tool for image analysis and comparison. A successor of PhantomCSS.

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis. Built and maintained by GCHQ (The UK intelligence and security organisation).