Sites like scanapi.dev

MonoGame, an open-source cross-platform C# framework for game development, run by the non-profit MonoGame Foundation with its news blog

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

Babel, an open-source JavaScript compiler project with documentation, a browser REPL and a team page, converting modern JavaScript to older-compatible code

Xonsh, a Python-powered cross-platform shell and documentation site for its Python-based command language

Spanish-language personal site of Andros Fenollosa, a developer offering a blog, courses, books and talks on web and backend programming

qutebrowser is a keyboard-focused, minimal-interface free web browser built on Python and Qt, licensed under the GPL

OpenFaaS, a serverless functions platform for deploying event-driven functions on Kubernetes or at the edge, run by OpenFaaS Ltd

A German-language tool, Repomix, that packs a code repository into AI-friendly text formats such as XML, Markdown and plain text

Personal blog by Miguel Grinberg on Linux containers, Python performance, Forgejo and other software development topics

Personal website of Dr Robin Wilson, a freelance remote sensing, GIS, data science and Python consultant, with talks and theses

Gensim, an open-source Python library for topic modelling and semantic vector representation of text, by Radim Řehůřek

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

Sonic Pi, a free code-based music creation and performance tool for live coding, composition and learning, by Sam Aaron

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

Personal site of developer Hsiaoming Yang blending open source tool notes, bilingual English and Chinese essays, and travel photographs

Personal blog and portfolio of Eevee, covering writing, drawing, games, toys and dev logs, with an explicit-content marker

django CMS is an open source content management framework built on Django, for enterprise websites and agencies

WebTorrent: an open-source JavaScript torrent client for browsers and desktop apps, with streaming playback and WebRTC peer connections

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

The International Obfuscated C Code Contest site: rules, entries, winners and FAQ for a yearly C programming contest, by Landon Curtis Noll and Simon Cookson

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

Martin Kleppmann's personal website: blog, conference talks and publications on local-first software and distributed systems by a Cambridge academic

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

A design and development agency that builds web and mobile products, with case studies and services from thoughtbot

fastlane is an open source tool for automating mobile app development, screenshots, beta distribution and store publishing

pqrs.org is a personal portfolio of macOS utilities, Thunderbird add-ons, hardware and retro emulation projects by its developer

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

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

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

Ant Design, an open-source React UI component library and design system, with its release changelog and documentation

OpenCV, the open-source computer vision library, with its services, training, partner program and blog, run by the OpenCV organisation

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

A minimalist blogging platform called Mataroa, where users write markdown posts on their own subdomain or domain, with an API and export options

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

Godot Engine, a free open-source 2D and 3D game engine with a project blog and forum, with news by Thaddeus Crews and others

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

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

The Rust Programming Language project's official site for the Rust systems programming language, with documentation, learning resources and community pages

Sessionize is a cloud software tool for managing conference call for papers, schedules and speakers

Leanpub, a self-publishing platform where authors sell early-access and in-progress books, including technical titles on software and AI

OpenClaw: an open-source AI assistant project with desktop, mobile and terminal installs, press coverage, privacy and security pages, run by Peter Steinberger

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

Gitea, a self-hosted Git and DevOps platform with code hosting, issue tracking and deployment tools, plus Gitea Cloud and Enterprise offerings