Testing Kotlin and Java annotation processors, compiler plugins
State of the art mutation testing system for the JVM
Go library that makes it easier to write automated tests
SikuliX version 2.0.0+ (2019+)
Scalable open source load testing tool
Supports tests, providing lightweight, throwaway instances of database
Formatted output of timed sections in Julia
Delightful JavaScript Testing
Testing for Developers. Toolkit that creates test-cases and data mocks
Write tests against structured configuration data
Test Runner for JavaScript
OS-agnostic, system-level binary package manager
Find vulnerabilities, misconfigurations, secrets, SBOM in containers
Bash automated testing system
SoapUI is a free and open source cross-platform functional testing
Cucumber for Ruby
Install and run Python applications in isolated environments
Thou Shalt Write Tests in Go
Automatically mock your HTTP interactions to simplify testing
Coverage-guided, in-process fuzzing for the JVM
Super-agent driven library for testing node.js HTTP servers
Development tools and libraries specialized for Angular
NUnit 3 Framework
The Swift (and Objective-C) testing framework
A JavaScript Testing Framework