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An open-source iPad notebook for Apple Pencil writing and PDF markup.

An open-source handwriting notebook with nested folders and encrypted cross-device sync.

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

Turn repeatable operational procedures into jobs that run commands or workflows on selected nodes.

Generate API and project documentation from annotated source code.

A private, open-source writing app built around searchable notes, pins, and trails.

An open-source team messenger with channels, direct messages, threads, and Frappe integrations.

Generate concrete syntax trees that stay responsive while source code changes.

Write text descriptions and render them as UML and other technical diagrams.

An open-source desktop notebook for stylus handwriting, PDF markup, layers, and audio notes.

A lightweight programmer's editor for website files, scripts, and source code.

Continuously fuzz accepted open-source projects to find crashes and other input-handling bugs.

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

Apply structured code-migration recipes across Maven and Gradle projects, then review the changed files.

Manage versioned files with a distributed source-control tool and a concise command-line workflow.

A desktop note environment for Markdown, source files, mind maps, PDFs, and other formats.

A community-developed, open-source font editor.

A macOS font viewer for shaping, variations and source comparisons.

Use channel-based team chat with open-source hosting and no per-seat charge.

AI APIs for image, video, audio, 3D and LLM models

Convert AsciiDoc source into HTML and other publishing formats with the Ruby-based reference implementation.

Write statically typed Nim programs and compile them with a toolchain designed for systems and application work.

Edit source files and send build or run output to an integrated pane on Windows or Linux.

Sentry-SDK-compatible error monitoring, available hosted or self-hosted.