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Open Source Projects tagged "Markdown"

A curated collection of the best open source projects tagged "Markdown". Each listing includes a website screenshot along with a detailed review of its features.

Firecrawl

AI
Turn any website into clean, AI-ready data via API

  • Stars

    Stars growing over the last 30 days202,017

  • Last commit

    11 hours ago

  • License

    AGPL-3.0
API for AI agents to search, scrape, crawl, and interact with the live web, returning clean Markdown, structured JSON, or screenshots from any page.

Open Source Alternative to:

Browserbase

Crawl4AI

AI
LLM-ready web crawler built for AI data pipelines

  • Stars

    87,399

  • Last commit

    2 days ago

  • License

    Apache-2.0
Open-source web crawler and scraper that produces clean, structured output optimized for LLMs, RAG pipelines, and AI agents. Supports async crawling, CSS/XPath/LLM extraction, and stealth browser control.

Open Source Alternative to:

Browserbase

Affine

Docs, whiteboards, and databases in one privacy-first workspace

  • Stars

    74,559

  • Last commit

    7 hours ago

  • License

    MIT
An open-source, local-first knowledge base that merges structured docs, infinite whiteboards, databases, and AI into a single workspace for teams and creators.

Open Source Alternative to:

Notion

Memos

Self-hosted timeline for quick notes, logs, and snippets

  • Stars

    64,485

  • Last commit

    16 hours ago

  • License

    MIT
Memos is a self-hosted, open-source note-taking app built around a private timeline. Write in Markdown, skip the folder setup, and keep your data on your own server.

Open Source Alternative to:

Notion

SiYuan

Privacy-first knowledge management with block-level linking

  • Stars

    47,244

  • Last commit

    4 hours ago

  • License

    AGPL-3.0
Personal knowledge management system with WYSIWYG block editing, bidirectional links, spaced repetition flashcards, a relational database, and end-to-end encrypted sync.

Open Source Alternative to:

Notion

Logseq

Privacy-first knowledge base that connects your notes

  • Stars

    45,602

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
Local-first, open-source knowledge management tool with bidirectional linking, outlines, flashcards, PDF annotations, and whiteboards for building a connected second brain.

Open Source Alternative to:

Notion

Seafile

Self-hosted file sync with AI-powered organization

  • Stars

    15,463

  • Last commit

    5 days ago

  • License

    Unknown
Open source file sync and sharing platform with custom properties, AI automation, collaborative editing, and enterprise-grade security for teams.

Open Source Alternative to:

Google Drive

TinaCMS

Visual editing for your Git-based content

  • Stars

    13,872

  • Last commit

    2 days ago

  • License

    Apache-2.0
A headless CMS that simplifies content management with real-time editing, Git-based workflows, and developer-friendly customization.

Open Source Alternative to:

WordPress

Blinko

AI-Powered Note Taking App

  • Stars

    11,209

  • Last commit

    11 days ago

  • License

    GPL-3.0
The next generation of open-source AI-powered card notes designed to help you quickly capture and organize inspiration so that ideas never run out.

Open Source Alternative to:

Notion

Silverbullet

Programmable notes with queries, Lua scripting, and wiki links

  • Stars

    Stars growing over the last 30 days6,538

  • Last commit

    5 hours ago

  • License

    MIT
A self-hosted, browser-based note-taking system that turns plain Markdown pages into a queryable, scriptable knowledge base you control.

Open Source Alternative to:

Notion

Standard Notes

Secure, encrypted notes for your digital life

  • Stars

    6,720

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.

Open Source Alternative to:

Obsidian

Voiden

Build APIs like code with Git-native workspace

  • Stars

    1,819

  • Last commit

    3 days ago

  • License

    Apache-2.0
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files.

Open Source Alternative to:

Postman

Zen

Clean, distraction-free note-taking with local storage

  • Stars

    1,197

  • Last commit

    4 days ago

  • License

    AGPL-3.0
Minimal note-taking app storing Markdown notes in local SQLite database. Features instant search, flexible tagging, keyboard shortcuts, and offline access.

Open Source Alternative to:

OneNote

Typemill

Open-source CMS for text-driven websites

  • Stars

    623

  • Last commit

    10 days ago

  • License

    MIT
Create manuals, documentation, and websites with this markdown-based content management system, with options for ebook conversion.

Open Source Alternative to:

Confluence

xyd

Transform documentation with developer-focused simplicity

  • Stars

    116

  • Last commit

    5 hours ago

  • License

    MIT
Create powerful, interactive documentation with hot reloading, TypeScript support, custom components, and built-in API docs generation.

Open Source Alternative to:

Mintlify

Koru

Local-first workspace that runs AI agents on your documents

  • Stars

    42

  • Last commit

    4 hours ago

  • License

    MPL-2.0
Write, organize, and run AI agents in a private workspace that stores everything locally, syncs peer-to-peer, and works offline on Windows, macOS, and Linux.

Open Source Alternative to:

Notion
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