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Apply chosen rules to Markdown and plain text

Web crawling and scraping API that returns clean markdown from web pages.

A tutoring classroom with an interactive whiteboard for annotating PDFs, worksheets, slides, and images together.

Edit code on iPhone or iPad with broad syntax highlighting, remote file access, and an SSH terminal.

A free, open-source notebook for organizing notes in the browser or on desktop.

Add formatted text, tables, syntax highlighting, and progress displays to Python terminal programs.

Keep reading notes, quotations, analysis, and source details beside the writing they inform.

A browser-based Elixir notebook for executable code and Markdown, with interactive results and collaboration.

Write with Apple Pencil in an Obsidian vault and keep handwritten pages beside Markdown notes.

Render a directory of content templates into a static website without requiring a client-side framework.

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.

AI summarizer and repurposing tool for videos, podcasts, articles and documents

AI note-taker that transcribes and translates speech in 74 languages

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

Interactive quizzes and gamification that run inside Microsoft PowerPoint.

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.