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Practise technical interviews anonymously with a human or AI

A Synology note app for notebooks, clippings, voice memos, and synchronized offline editing.

An open-source collaborative Markdown editor for notes, diagrams, and presentations.

A simple free desktop notebook with safe saves, version history, folders, and a focus mode.

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

Write naturally by hand and add PDF pages to notes for markup.

A local-first knowledge notebook that combines text, handwriting, boards, and linked notes.

A free, open-source Markdown editor for research notes and long-form writing.

A zoomable handwriting and planning notebook with sub-pages and document annotation.

An infinite canvas for notes, images, links, to-dos, and nested visual boards.

A notebook app for Mac, iPad, and iPhone with hierarchical pages, handwriting, and cloud sync.

A local-first personal knowledge workspace for private notes, linked objects, and databases.

Organize research notes, themes and key insights

AI-native Markdown notes with encrypted sync for developers

Manage health-practice calendars, patient booking, billing, notes, and workflows in one system.

Collaborate on an online canvas with sticky notes, drawing tools, comments, timers, and board templates.

Keep direct and group conversations in context with channels, threads, reactions, and voice notes.

A local-first desktop notebook that stores Markdown notes and canvases on the user’s computer.

Read study PDFs and make notes as part of one annotation workflow.

Build a hierarchical personal knowledge base locally or on a self-hosted server.

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

A connected note system with rich-text editing, hubs, collections, and built-in journaling.

A distraction-free Markdown editor for local notes on Windows, macOS, and Linux.

A free Markdown writing workspace with live preview, local files, and exports.