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
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
A modern, C++-native, test framework for unit-tests, TDD and BDD
Supports tests, providing lightweight, throwaway instances of database
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
A Coverage-Guided, Native Python Fuzzer
Cucumber for Ruby
Install and run Python applications in isolated environments
NUnit 3 Framework
Most popular Mocking framework for unit tests written in Java
Automatically mock your HTTP interactions to simplify testing