Sites like maplibre.org

Protomaps: a free, customizable open source world map distributed as a single PMTiles file, with a hosted tile API

Optional Ltd, a UK software company building privacy-first consumer and business apps, including MOT Plate and Company Map

Personal blog by Zsolt Ero, a full-stack developer, covering software development, AI, and his paragliding trips in Hungarian

Nominatim, an open-source geocoding software and API using OpenStreetMap data for place name and address lookup, maintained by Sarah Hoffmann

VersaTiles, a free and open-source stack for generating, distributing and using OpenStreetMap map tiles, with a sponsor-funded server

OpenAddresses is a free, open global collection of street, house number and postal address data with coordinates

The Open Source Geospatial Foundation website, a nonprofit hub supporting geospatial open source software projects, their community, events and governance

pgRouting project website documenting an open-source PostGIS extension for geospatial routing functionality, with manuals, workshops and sponsorship information

Kyle Walker's data science blog and consultancy site on GIS, census demographics, and spatial analysis in R

Spectral Reflectance, a Substack newsletter by Akis Karagiannis with news, technical posts and research on Earth Observation

A UI framework and documentation site for the Svelte web framework, which compiles components into minimal browser code

TechOverflow is a Munich engineering consultancy and lab offering product development services, with a blog on electronics, firmware and embedded software

John Coene's personal website, with a book on JavaScript for R, R package documentation, and talk slides on R and Shiny

A searchable database of public-domain silhouette images of organisms for use in scientific and educational work, with a free API

Verdaccio, a lightweight private npm registry project with documentation, command-line reference, environment settings, testing guides and video talks

A podcast on geospatial mapping, GIS, and remote sensing tools, people, and ideas, hosted under the Mapscaping name

A crowd-sourced map of over 44,000 memorial benches, with photos and inscriptions, where users add new benches

VueUse is a documentation site for a collection of Vue 3 Composition API utility functions and add-ons

Vite, a frontend build tool and development server for modern web projects, documented by its core team

Poimandres, an open-source developer collective's site on React and three.js 3D graphics, with articles and projects by Christian Ortiz

A French collaborative website on free and open-source geomatics, with articles, tutorials, press reviews and tool presentations

The unified collective's documentation and tooling site for parsing, transforming and serializing content through syntax trees, with guides, recipes and package listings

TanStack, an open-source collection of headless web application libraries and tools, with a design system, blog and chat app

Kavita, a self-hosted digital library server for EPUB, PDF, comic and manga reading with built-in readers

Personal site of software engineer Ben Hoyt, with his résumé, open source Go and Python projects, and technical writing

A French association's platform for filing and tracking requests for access to public administrative documents, with a discussion forum

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

Tiptap, a headless open-source rich text editor framework and its commercial cloud platform for building custom editors

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

unsigned.io is a personal site by an independent developer covering Reticulum mesh networking, LXMF messaging, and open-source RNode radio hardware

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

A JavaScript UI library site for Preact, a small React-like framework, with its blog, docs and branding pages

NgRx documentation and guides on reactive state management for Angular applications, covering the Global Store and SignalStore

Vite, a frontend build tool and documentation site for modern web application development, with team and event pages

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

Motion, an open-source JavaScript and React animation library with docs, showcase examples and a paid Motion+ component kit