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

A Markdown notebook that keeps notes in a Git-backed repository and works in the browser or desktop apps.

Native Markdown notes for Mac and iPhone, stored in files you can open elsewhere.

A cross-device Markdown editor with a free writing core and an optional lifetime Pro upgrade.

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

A native Markdown notebook that adds linked notes, task lists, Kanban, and optional AI tools.

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

Study tool that turns your course materials into practice questions and study tools.

Everyday English listening in an Australian setting.

AI quiz generator that turns text, PDFs, YouTube videos, and images into quizzes.

Manage plain-text task lists from the shell with a simple and extensible command-line tool.

Automate command-line work across Windows, Linux, and macOS with an object-based shell and scripting language.

Live audience questions and self-paced questionnaires for business training

Nurse-practitioner certification preparation with live and on-demand review, study questions and practice assessments.

Mobile-style interface components for working app prototypes

Open-source newsletters with several editors and optional tracking

A private Markdown second brain that also supports shared, searchable company knowledge.

A local-workspace knowledge manager for Markdown, mind maps, diagrams, and other files.

AI social intelligence that tags posts and answers questions with cited mentions

AI website builder that creates and hosts self-optimizing sites

A local-first Markdown note app with an optional self-hosted encrypted sync server.

AI English speaking app for IELTS, TOEIC, and TOEFL practice

AI data analyst for spreadsheets and reports

AI test automation for Salesforce and enterprise web applications