Sites like pytest.org

A documentation site for pre-commit, a framework for managing and running git pre-commit hook scripts before code review

NumPy project website: the official home of the open source Python library for numerical computing and N-dimensional arrays

JUnit, a open-source testing framework for Java and the JVM, with documentation, release notes and project information

A Python plotting library documentation site for Matplotlib, covering static, animated and interactive data visualizations

Personal website of Sebastián Ramírez, a Colombian software developer, sharing ideas, guides and his open source projects like FastAPI

conda-forge: a community-run GitHub organization of conda recipes, packages and the Miniforge installer for software distribution

SciPy, an open source Python library of algorithms for scientific computing, covering optimization, integration, interpolation, statistics and differential equations

Selenium, an open-source browser automation tool for web application testing, documented on its official project website

A JavaScript testing framework named Jest, documented on its official site, with French and English pages and community help

Encode is a software development collective producing open-source tools funded jointly by its member companies

The aiohttp.org site is the documentation and project page for aiohttp, an asynchronous Python HTTP client and server library built on asyncio

Pocoo, a former team of open source developers behind Python projects Flask, Sphinx, Jinja, Werkzeug and Pygments

Jeff's personal blog and project hub on Python development, Unix sysadmin tools, and open source libraries like Fabric and Paramiko

A project website for PyPy, an alternative implementation of the Python programming language with a just-in-time compiler

Personal website of Thea "Stargirl" Flowers, a creative technologist and open source advocate sharing her portfolio, talks and tools

Mocha, a JavaScript test framework for Node.js and browsers, with its project documentation and API reference

The pages came through as binary garbage with no readable titles or headings, so the site's subject can't be determined from them. Going only by the domain, python.org is the official home of the Python programming language

Scikit-learn, an open-source Python library of machine learning tools for predictive data analysis, with documentation, FAQ and installation guides

The Trojan, a technical blog by Apoorv Tyagi on Java, Kubernetes, Kafka and production debugging

NumFOCUS, a nonprofit charity supporting open source scientific software projects such as SciPy, pandas and Jupyter

xUnit.net is an open source unit testing tool for C#, F# and Visual Basic, led by project lead Brad Wilson

Golangci-lint is a fast linters runner for the Go programming language, with documentation for installation and configuration

WebdriverIO API reference documentation for the WebdriverIO browser and mobile test automation framework's commands and protocol bindings

Hynek Schlawack's personal website, a blog and talk archive on Python, Go, TLS and small programming discoveries

A testing framework called Vitest, powered by Vite, with documentation for writing, mocking and configuring JavaScript tests

Appium documentation: an open-source software project for UI automation of mobile, browser and desktop apps

A collection of free image processing algorithms and documentation for the scikit-image toolbox in Python

Camila Maia's personal website showcasing her software engineering projects, conference talks and Python community work, including the ScanAPI testing library

Personal blog by software engineer Dmitry on cybersecurity, Python, Rust and his open source projects

Falcon, a minimal Python web framework for building fast REST APIs, documented on its project site

ESLint project website: documentation, playground and team pages for ESLint, the pluggable open-source JavaScript linter

Biome, an open-source toolchain for web projects that formats, lints, and checks JavaScript, TypeScript, and related code

A technology tutorial blog from Krython covering JavaScript, TypeScript, Node.js, Python, Linux, and modern web development

Brett Cannon's personal blog "Tall, Snarky Canadian" on Python packaging, supply chains and open-source governance

JSON Schema is a declarative language and documentation site for annotating and validating the structure and data types of JSON documents

A Python GraphQL library and documentation site, Strawberry, maintained by a small team of open-source developers

Bernát Gábor's blog and project pages on Python packaging, tox, virtualenv and other open-source tools, plus talks

A personal blog by Cheuk Ting Ho on Python, Rust and PyO3 programming, with workshops and conference notes

Tobias's personal blog covering Django, Open Source software, conference organising, book lists and other personal writing

Authlib, a Python library for OAuth and OpenID Connect clients, servers and protected APIs, maintained by Hsiaoming Yang and team