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Beaver NotesNotes & Knowledge ManagementOpen-source desktop notes app that stores notes on your own device, with no account and no analytics. It offers a Markdown-aware editor, labels, folders, note links, locked notes, Mermaid and math blocks, and optional sync through a folder you choose.Open sourceSoftware
BlinkoNotes & Knowledge ManagementBlinko is a GPL-3.0 note-taking server for quick card notes and longer Markdown notes, with RAG search, AI chat, MCP and an OpenAPI interface. It runs from one Docker image on PostgreSQL; a hosted Blinko Cloud edition is also offered.Open sourceSelf-hostedFreemium
BragDocNotes & Knowledge ManagementBragDoc is an MIT-licensed achievement tracker that runs on your own machine, collects evidence from screenshots, files and merged GitHub PRs, exposes an MCP endpoint for coding agents and exports Markdown for self-reviews.Open sourceSelf-hosted
DEV CommunityTutorials & CoursesDEV Community (dev.to) is a community of software developers who publish Markdown articles, comment, follow tags and join writing and hackathon challenges. It runs on Forem, the AGPL-3.0 Ruby on Rails community platform that others can deploy for their own communities.Open sourceSelf-hostedFree
HarperCode Editors & IDEsHarper is a free, Apache-2.0 English grammar and spell checker from Automattic that runs locally. It ships as a language server, browser extensions, an Obsidian plugin, a macOS app and a JavaScript library.Open sourceWeb platform
Hold My DocsNotes & Knowledge ManagementHold My Docs (HMD) is an MIT-licensed self-hosted wiki written in Go. Pages are Markdown files in a Git repository, every save is a commit, and namespaces can be private, public or exported as static sites, with OIDC, an API and an MCP server.Open sourceSelf-hosted
itsnotesNotes & Knowledge ManagementMIT-licensed, self-hosted note board in the style of Google Keep, run with Docker and PostgreSQL. Adds month markers, folders, saved searches, note history, Keep and Obsidian import, a Markdown mirror, optional AI and a read-only MCP server.Open sourceSelf-hosted
KoruNotes & Knowledge ManagementKoru is a free, MPL-2.0 desktop workspace for notes, documents and terminal sessions. Data stays on your devices and syncs peer-to-peer, AI agents connect through a local MCP server, and Koru Cloud is an optional paid add-on.Open sourceSoftwareFreemium
MemosNotes & Knowledge ManagementMemos is an MIT-licensed, self-hosted note-taking server written in Go. Short Markdown memos land on a dated timeline with tags, Views, Spaces and per-memo visibility, stored in SQLite, MySQL or PostgreSQL on your own host.Open sourceSelf-hosted
MermaidDiagramming & WhiteboardsOpen-source JavaScript diagramming library: write flowcharts, sequence, ER, Gantt and many other diagrams as Markdown-like text and render them to SVG in the browser, in docs and in build pipelines.Open sourceWeb platform
MinutesAI Voice, Speech & TranscriptionMinutes is a free, MIT-licensed conversation memory app for macOS, Windows and Linux. It transcribes meetings, calls, memos and dictation on-device with Whisper or Parakeet and saves Markdown that Claude Code, Codex or any MCP client can query.Open sourceSoftware
NonographCMS & Website BuildersNonograph is a public-domain Telegraph alternative written in Rust. Anyone can publish a formatted page without an account; posts are stored as flat Markdown files, and the Docker image creates its own Tor onion address.Open sourceSelf-hosted
ObsidianNotes & Knowledge ManagementObsidian is a free note-taking app by Dynalist Inc. that stores notes as local Markdown files, with links, graph view, Canvas, Bases, a CLI and community plugins, plus optional paid Sync and Publish services.CommercialSoftwareFreemium
OpenNotasNotes & Knowledge ManagementAGPL-licensed personal note-taking PWA built with Nuxt. Notes live in browser IndexedDB, three Markdown editors are included, and optional sync pushes AES-GCM encrypted data to a Turso database you own, with images in S3-compatible storage.Open sourceSelf-hosted
Payload CommentsCMS & Website BuildersPayload Comments (@navanem/payload-comments) adds anonymous comments, emoji reactions, optional pre-publish moderation and up to three levels of replies to Payload CMS 3, with a React component, REST endpoints and an admin statistics view.Open sourceSelf-hosted
PubliiCMS & Website BuildersPublii is a free GPL-3.0 desktop CMS for Windows, macOS and Linux that generates static HTML sites with block, WYSIWYG and Markdown editors and uploads them to FTP, SFTP, S3, Netlify or GitHub Pages.Open sourceSoftware
SilverBulletNotes & Knowledge ManagementSilverBullet stores notes as Markdown files in a folder and adds backlinks, object queries and Space Lua scripting. The Server is MIT-licensed and self-hosted; Desktop for macOS, Windows and Linux is free for personal use.Open sourceSelf-hostedFreemium
SiYuanNotes & Knowledge ManagementSiYuan is an AGPL-3.0 personal knowledge management app built on block-level references, Markdown WYSIWYG editing and databases. It runs on desktop, mobile or Docker, keeps data in a local workspace and sells optional sync.Open sourceSelf-hostedFreemium
Standard NotesNotes & Knowledge ManagementAGPL-licensed note-taking app that encrypts notes, tags and files on the device before sync. Free plan with unlimited devices; paid plans add the Super editor, spreadsheets, revision history and 100 GB of file storage. The server runs on Docker.Open sourceSelf-hostedFreemium
TolariaNotes & Knowledge ManagementTolaria is an AGPL-licensed desktop app for macOS, Windows and Linux that manages a folder of Markdown files with YAML frontmatter as a vault, adding types, relationships, saved views, a built-in Git client, spreadsheet notes and AI agent integration.Open sourceSoftware
ZenNotes & Knowledge ManagementZen is an AGPL-licensed, single-user notes server: Markdown stored in SQLite, tags and Focus Modes instead of folders, BM25 search, version history, templates, tag-scoped API tokens and an experimental MCP server. It runs from Docker or one Go binary.Open sourceSelf-hosted