SoapUI is a free and open source cross-platform functional testing
SikuliX version 2.0.0+ (2019+)
NUnit 3 Framework
Delightful JavaScript Testing
Go library that makes it easier to write automated tests
Android in docker solution with noVNC supported and video recording
LazyLoad is a lightweight, flexible script that speeds up your website
Formatted output of timed sections in Julia
State of the art mutation testing system for the JVM
Scalable open source load testing tool
Development tools and libraries specialized for Angular
Visual diffing in CI for user interfaces
Thou Shalt Write Tests in Go
Test Runner for JavaScript
Install and run Python applications in isolated environments
Testing for Developers. Toolkit that creates test-cases and data mocks
Cucumber for Ruby
A modern, C++-native, test framework for unit-tests, TDD and BDD
PerfView is a CPU and memory performance-analysis tool
Supports tests, providing lightweight, throwaway instances of database
OS-agnostic, system-level binary package manager
A Coverage-Guided, Native Python Fuzzer
Fast, easy and reliable testing for anything that runs in a browser
Automatically mock your HTTP interactions to simplify testing
Interactive evaluation for Neovim