PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
State of the art mutation testing system for the JVM
SoapUI is a free and open source cross-platform functional testing
Scalable open source load testing tool
Go library that makes it easier to write automated tests
Testing for Developers. Toolkit that creates test-cases and data mocks
Delightful JavaScript Testing
Testing Kotlin and Java annotation processors, compiler plugins
Development tools and libraries specialized for Angular
Find vulnerabilities, misconfigurations, secrets, SBOM in containers
PerfView is a CPU and memory performance-analysis tool
Fast, easy and reliable testing for anything that runs in a browser
Supports tests, providing lightweight, throwaway instances of database
A modern, C++-native, test framework for unit-tests, TDD and BDD
The most advanced tool for HTTP API
Test Runner for JavaScript
Formatted output of timed sections in Julia
A JavaScript Testing Framework
OS-agnostic, system-level binary package manager
Thou Shalt Write Tests in Go
Automation for iOS, Android, and Windows Apps
Cucumber for Ruby
A Coverage-Guided, Native Python Fuzzer
Install and run Python applications in isolated environments
NUnit 3 Framework