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PDF content editing and organization on Windows and mobile

AI presentation maker that turns prompts or files into editable slides

A legacy icon-font toolkit with stylesheet source and familiar modifiers.

An icon-font toolkit with CSS and several stylesheet-source formats.

A multi-format notebook for handwriting, PDFs, voice notes, and study documents.

A visual knowledge notebook for connecting research, highlights, and ideas on whiteboards.

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

A teaching whiteboard with video calls, lesson materials, and PDF or image annotation.

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

A shareable infinite drawing board for handwriting, tutoring, diagrams, and PDF markup.

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

Handwritten study notes, PDF markup, audio capture, and AI-assisted review for students.

Write and annotate handwritten notes on Android with page layouts, linked notes, and PDF tools.

AI toolkit that turns text or images into 3D models and textures.

Edit and convert animated images

A handwritten notebook for Apple Pencil notes, PDF markup, study tools, and creative pages.

Map and migrate database schema, data, and indexes

Render, inspect, extract, and restructure PDFs from a terminal

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

An open-source academic notebook that brings Markdown notes, PDF annotations, and literature management together.

A handwriting notebook with note-linked audio, handwriting recognition, and PDF annotation.

Explore BGP prefixes, peers and routing reports

Building-services calculations with visible equations

Note taking tool with flashcards, PDF annotation, and AI study features