Open source. Open possibilities.

MkDocs is a fast, simple static site generator for project documentation: write pages in Markdown, configure the site with a single YAML file, and build static HTML that can be served anywhere.

Parker is a minimal, keyboard-first macOS menu-bar editor for notes, code and Markdown, built on Tauri with React and CodeMirror. It works on a plain folder of files you own, with aggressive auto-save and optional built-in git backup for versioning.

Marked is a fast, lightweight Markdown parser and compiler that works in browsers, on Node.js servers, and via CLI. It supports all standard Markdown features, custom extensions, and is easily adaptable for different use cases.

SpecScore CLI is a tool for linting, querying, and scaffolding SpecScore specifications, featuring executable acceptance scenarios and AI agent configuration.

VitePress is a Vue-powered static site generator built on Vite, the spiritual successor to VuePress. It turns Markdown into fast static documentation sites with Vue components, theming and search integration.

mq-db is a Rust-based embedded database that treats Markdown as a structured, hierarchical store with interval indexing, supporting SQL and mq queries, full-text search, and write‑back editing.

An MIT-licensed family of independent TypeScript packages that convert losslessly between OOXML, OpenDocument, Markdown, EPUB, PDF, RTF and legacy formats through one shared Zod schema, with a CLI, MCP server and web UI built on top.

CoalLedger is a docs-health checking suite for AI coding agents — the documentation counterpart to CoalMine's code canaries. Seven canaries flag wrong, incomplete, stale, contradictory, broken, unreadable and (optionally) leaked documentation, with a bundled zero-dependency CommonMark+GFM AST engine, context-judged severity and choice-gated fixes.

Lemory is a local middleware that transforms markdown notes (e.g., Obsidian vaults) into a context database for AI agents. It supports keyless on-device hybrid search, Korean-specific processing, hierarchical token savings, and knowledge graph visualization, integrating with various AI tools via MCP.

Rich is a Python library for beautiful terminal formatting: colors, styles, tables, progress bars, markdown, syntax highlighting, tracebacks, logging, and more, with a flexible Console API and rich print.

An open, git-based standard for organizing agent knowledge and instructions in portable Markdown folders, with a TypeScript reference library and conformance kit.

Prettier is an opinionated code formatter that parses code and reprints it with consistent rules, taking maximum line length into account and wrapping when needed. It can run in editors on save, pre-commit hooks, or CI.

MarkText is an open-source Markdown editor featuring a real-time WYSIWYG preview. It supports CommonMark, GitHub Flavored Markdown, and Pandoc markdown, with capabilities for exporting to HTML and PDF.

remark is a plugin-driven markdown processor from the unified collective. It parses markdown into an AST (mdast), lets plugins inspect and transform it, and serializes it back, with 150+ plugins and a CLI for linting and formatting.

Slidev is an open-source presentation framework for developers, using Markdown and Vue to create slides with code highlighting, live coding, themes, presenter mode, drawing, LaTeX, Mermaid diagrams, icons, recording, and export to PDF, PNG, or PPTX.

MDX is an authorable format that lets you write JSX directly inside Markdown documents, so you can import and embed interactive components in long-form content. This repo provides packages to compile MDX to JavaScript and integrate it with bundlers and frameworks like React, Preact and Vue.

Grav is a fast, flexible flat-file CMS built on PHP, Markdown, Twig and Symfony components. It needs no database or installation—just extract the archive—and includes a package manager for installing and updating plugins and themes.

Jekyll is a blog-aware static site generator written in Ruby. It turns Markdown and Liquid templates into a complete static website that can be served by any web server, and it powers GitHub Pages.

Firecrawl is an open-source web data API for searching, scraping, crawling, and interacting with websites, turning pages into clean Markdown, JSON, or screenshots for LLM-ready use by AI agents and applications.

Litrepl is a command-line tool and Vim plugin that evaluates and updates code sections within Markdown or LaTeX documents using background interpreters like Python, Bash, and IPython, enabling literate programming workflows.