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Store notes and files in an encrypted notebook that syncs across devices.

A repository-backed notes app that keeps editable Markdown files on Apple devices.

A project-based IDE for writing and running R-centered data work, with support for Python scripts and documents.

A privacy-first, open-source knowledge base for structured personal notes.

Organize rich notes with nested notebooks, tags, and quick-access shortcuts.

Organize a personal knowledge base with block-level notes, references, and bidirectional links.

Add tags to notes and keep their related tasks and calendar context nearby.

Write analytical reports with SQL, Markdown and components in a code repository.

Open-source newsletters with several editors and optional tracking

A handwriting notebook that links notes and searches handwriting, Markdown, and PDF text.

Save notes, links, and images as cards and revisit them through search and reflective prompts.

Format source files with a consistent, opinionated printer that supports common web and configuration languages.

Assemble an internal wiki from drag-and-drop pages, handbook content, and team widgets.

Share team knowledge in a Markdown wiki with search, collaboration, and administration tools.

Create versioned product docs, API references, and help centers from one workspace.

Build a documentation or knowledge site with Next.js and Markdown or MDX pages.

Self-hosted Markdown comments with an explicit approval queue

An open-source notebook with a freeform canvas, handwriting, Markdown, and local files.

Keep notes, scribbles, images, videos, and web clips together on a visual canvas for Mac.

AI mind map generator that turns text, files, and videos into visual maps.

AI-native Markdown notes with encrypted sync for developers

Author software user guides and manuals, then publish them online or as help files.

Export AI chat history from many platforms to Markdown and other formats.

Headless, open source editor framework with paid add-ons for AI, collaboration and document conversion.