Sites like pre-commit.com

A documentation site for pytest, the Python testing framework, with a list of talks, books and tutorials about it

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

RobotCode, a toolkit of editor extensions and command-line tools for developing and testing Robot Framework projects

A catalog of open source JSON, YAML and TOML schemas used by editors and tools for validation and completion

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

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

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

Woodpecker CI, a continuous integration server forked from Drone 0.8, with an awesome-list of related tools and tutorials

PDM, a Python package and dependency manager documentation site covering installation, dependency management, building and publishing projects

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

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

Prettier, an opinionated code formatter for JavaScript, CSS, Markdown and other languages, with editor and CI integrations

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

An open source, configurable SQL linter and auto-fixer tool, with dbt and Jinja templating support

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

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

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

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

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

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

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

The official website for Nix and NixOS, covering the reproducible, declarative package manager and Linux distribution, with manuals and learning resources

A spell checker for source code, offered as a command line tool, library and VS Code extension by the CSpell project

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

Gregory Szorc's personal blog and notes on Python tooling, open source projects, and his technical career history

The HDF Group, a non-profit company maintaining the HDF5 data format and library for scientific and engineering data management

Branchable is a hosting service for Ikiwiki-powered websites, wikis and blogs built on Git

Personal blog by Tom Wright on software development, including posts on YAML tooling and GitHub Actions

Neovim, a Vim-based open-source text editor project with extensible Lua plugins, documentation and developer resources

Open source framework for managing Zsh shell configuration, with bundled plugins, themes and helper functions, maintained by a community

Homebrew, a package manager for installing software on macOS, Linux and WSL from the command line

Helix, a modal text editor written in Rust with multiple selections, tree-sitter and LSP support

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

The MacPorts Project's official site offering a package manager for installing open-source software on macOS and other Unix-like systems

The official website for the Go open-source programming language, with documentation, tutorials, and the Go Blog

External Secrets Operator documentation for a Kubernetes operator that syncs secrets from external stores into cluster Secrets

The Roc programming language's official site, covering a functional language designed for fast compiled code and WebAssembly

Alpine Linux, an independent lightweight Linux distribution built on musl libc and busybox, with its release announcements and documentation

Personal research website of Peter Karpov, a computer science scholar, covering metaheuristic and bioinspired algorithms with papers, algorithm pages and code

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