NoteDiscovery is a self-hosted Markdown knowledge base described as free and open source. It includes wikilinks, graph view, a drawing editor, LaTeX math, and Mermaid diagrams, along with AI assistant integration via MCP. Notes are stored as plain Markdown files in folders, and the project offers a Docker-based setup.
AppFlowy is a self-hosted AI workspace for enterprise teams to manage projects, wikis, and data with private AI, flexible databases, and full data control. It runs on the user's infrastructure, in the cloud, or in a fully air-gapped environment. It is available on macOS, Windows, Linux, iOS, Android, and the web.
BookStack is a free, open-source, self-hosted platform for organising and storing information, positioned as simple wiki software. Content is organised into books, chapters and pages, with a WYSIWYG or Markdown editor, built-in diagrams.net drawing, search, configurable branding and multi-lingual support. It runs on PHP with the Laravel framework and MySQL.
Notesnook is an open-source note-taking app with end-to-end encryption, available as desktop, web and mobile clients. It supports notebooks, tags, favorites, pins, linked notes, an app lock and publishing a single note as a web page behind an optional password. It offers sync across devices and imports from Evernote, Google Keep, Obsidian, Joplin and other apps and formats.
Mochi is a note-taking and spaced-repetition flashcard app built on Markdown. Notes and flashcards are created in the same workspace, where they can be linked together, organized with tags and filters, and reviewed on a schedule. The app is available for Mac, Windows, Linux, iOS, and Android.
Saber is a cross-platform notes app built for handwriting. Notes are encrypted and stored so the server cannot read them, and can be synced across phones, tablets, and computers. The highlighter renders underneath the text without overlapping itself, notes can be organized into nested folders, and dark mode darkens the notes as well as the interface. The software is free and open source.
Butterfly helps clean, compare, sort, transform, count, or format text in the browser.
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AppFlowy is a self-hosted AI workspace for enterprise teams to manage projects, wikis, and data with private AI, flexible databases, and full data control. It runs on the user's infrastructure, in the cloud, or in a fully air-gapped environment. It is available on macOS, Windows, Linux, iOS, Android, and the web.
BookStack is a free, open-source, self-hosted platform for organising and storing information, positioned as simple wiki software. Content is organised into books, chapters and pages, with a WYSIWYG or Markdown editor, built-in diagrams.net drawing, search, configurable branding and multi-lingual support. It runs on PHP with the Laravel framework and MySQL.
Notesnook is an open-source note-taking app with end-to-end encryption, available as desktop, web and mobile clients. It supports notebooks, tags, favorites, pins, linked notes, an app lock and publishing a single note as a web page behind an optional password. It offers sync across devices and imports from Evernote, Google Keep, Obsidian, Joplin and other apps and formats.
Mochi is a note-taking and spaced-repetition flashcard app built on Markdown. Notes and flashcards are created in the same workspace, where they can be linked together, organized with tags and filters, and reviewed on a schedule. The app is available for Mac, Windows, Linux, iOS, and Android.
Saber is a cross-platform notes app built for handwriting. Notes are encrypted and stored so the server cannot read them, and can be synced across phones, tablets, and computers. The highlighter renders underneath the text without overlapping itself, notes can be organized into nested folders, and dark mode darkens the notes as well as the interface. The software is free and open source.
Butterfly helps clean, compare, sort, transform, count, or format text in the browser.
