AChecker

An open-source web accessibility checker

Nogotofail

An on-path blackbox network traffic security testing tool

OpenClover

Most sophisticated code coverage tool for Java and Groovy.

Nbomber

Load test any system with a distributed cluster

lemoncheesecake

Python framework for end-to-end / QA testing

Wfuzz

Automate web applications security assessments

JsonT.run

online JSON formatting and processing tool with powerful functions

It Tools

Aggregated set of useful tools that every developer and tester may need once in a while.

beef

It is a penetration testing tool that focuses on the web browser.