Sites like asciidoctor.org

AsciiDoc book editor built on JavaFX 19, with a pseudo terminal, PlantUML and Mermaid extensions, and install guides

PlantUML, an open-source tool that draws UML diagrams from simple text descriptions, with a Q&A forum and German edition

A Swiss software company's site offering Java logging framework support, consulting and open-source project pages, run by QOS.CH Sarl in Vouvry

Vale, an open-source command-line prose linter that checks documents against team style guides, by Vale Labs

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

JReleaser is a release automation tool for publishing project artifacts and checksums across many languages and package managers

CIDER, an Emacs package and documentation site for interactive Clojure development with a running REPL

Documentation and project site for DITA Open Toolkit, an open-source Java publishing engine that converts DITA XML content into output formats

Essays on programming and open-source by Bozhidar Batsov, creator of RuboCop, CIDER, and Prelude, a blog

SDKMAN!, a command-line tool for installing and switching between multiple software development kits on Unix systems, with a catalogue of JDK distributions

TeaVM is an ahead-of-time compiler tool that turns Java bytecode into JavaScript and WebAssembly for web apps, with documentation

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

Vivliostyle, an open source project and website on CSS-based typesetting tools for digital and web book publishing

The LaTeX Project's website on LaTeX, the document preparation and typesetting system for technical and scientific publishing, with downloads, bug reporting, help and licence text

The Dhall programmable configuration language, its typed functions, imports and tooling, documented on its official project website

An Architect's View, a blog by Sean Corfield about Clojure tooling, libraries, funding updates and the Clojure community

A free online OAuth 2.0 and OpenID Connect debugging workbench with validators, browser flow launchers, and token inspectors

JHipster, an open source platform for generating full stack Java applications with Spring Boot and Angular or React

Make with Hugo is a tutorial blog on building sites with the Hugo static site generator, covering themes, templates and features

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

Erik Darling Data is a consultancy and training business by Erik Darling offering SQL Server performance tuning and AI workshops for database teams

A personal tech blog by a software developer covering troubleshooting, command-line tools, JSON, YAML, Git and CI/CD

Commonhaus Foundation, a non-profit hosting and sustaining open source Java libraries and frameworks, with its council votes and bylaws published

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

Podlite, a markup language and toolset for structured documentation, with its editor, desktop app, CLI and web site generator

Parcel, a zero-configuration JavaScript build tool for the web, with release announcements and blog posts from its team

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

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

hledger is an open-source plain text accounting tool and manual for tracking money, investments, and time with double-entry bookkeeping

MapStruct is a Java code generator project for simplifying bean-to-bean mappings, documented on its official project website

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

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

A language-learning site teaching Manding (Bambara, Dioula, Malinke) through self-paced lessons, videos and blog posts on culture and cooking

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

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

A technical communication blog by Sarah Maria, covering writing, documentation, API docs, and AI book reviews

A documentation site for FastEndpoints, an open-source .NET framework for building ASP.NET web API endpoints