Open source. Open possibilities.

AFFiNE is an open-source, privacy-focused workspace that merges documents, whiteboards, and databases into a single local-first platform for knowledge management and planning.

A collection of 120 plain-text DESIGN.md brand design specifications reverse engineered from live production sites, letting AI coding agents generate on-brand UI. Each brand includes real colors, typography, components and guardrails plus a self-contained preview.html.

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.

Wiki.js is a modern, lightweight open-source wiki application built on Node.js. It supports multiple database backends including PostgreSQL, MySQL, SQLite, MariaDB, and MSSQL, offers full Markdown support, real-time collaborative editing, role-based access control, and multilingual content management.

Source for Lucius7's Blog, a personal site built on the Fuwari theme for Astro with separate Chinese and English sections, Markdown drafts, KaTeX math, Pagefind search, RSS and sitemap, deployed to GitHub Pages by GitHub Actions.

Self-hosted Telegram bot that turns an Obsidian vault into a personal AI agent: capture text, voice, photos and links, then file them as markdown, kanban tasks and a finance ledger. Modules (planning, knowledge, finance) are fail-closed and can be disabled entirely.

UPORTAL is an open-source self-hosted platform for email tracking, link tracking, and controlled publication management, featuring a Thunderbird add-on, hosted Markdown pages, file download tracking, and unified analytics.

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

WriteFreely is a minimalist, self-hostable publishing platform built for writers: an auto-saving Markdown editor, ActivityPub federation for connected communities, OAuth 2.0, multiple blogs per account, and localization in 20+ languages.

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.

Docling parses diverse document formats including PDF, DOCX, PPTX, XLSX, HTML, EPUB, images, audio, and more, with advanced PDF understanding, export to Markdown/JSON, OCR, VLM support, and integrations with LangChain, LlamaIndex, and other AI frameworks for RAG and agentic workflows.

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.

A personal blog and website built with Jekyll using the Chirpy theme, published to GitHub Pages. Content is organised by categories and tags across several migrated blog sources, with linting and CI workflows for building and testing.

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.

Floral Notepaper is a lightweight cross-platform desktop note-taking tool built with Tauri 2 and React, featuring Markdown editing and preview capabilities.