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A graphical environment for building measurement, instrument-control, and test applications with the G language.

A Markdown writing and notes app with folder and Library modes for Apple devices.

Technical data and calculations for engineering study

Functional UX prototypes with logic and data

Organize research notes, themes and key insights

Wireframes and product diagrams on shared boards

Free photos, diagrams, audio and video with individual licences

Windows drawing with familiar tools and editable layers

Sketch diagrams and ideas together on a live team canvas.

Icons for AI, agent and data workflows with related weight variants.

Sketch product ideas and system diagrams together on a structured team whiteboard.

Free open-source desktop GUI prototyping

A real-time infinite canvas with notes, shapes, tables, sections, connectors, embeds, and agent collaboration.

KDE raster drawing with selective colour replacement and close-up editing

An IEC 61131-3 development system for programming industrial controllers and automation devices.

Publish XML and HTML documents using XSL-FO or CSS

A sketch-style whiteboard for diagrams and early wireframes

A website-planning suite for navigation, flows and content

Interactive user-flow presentations synchronized with screen designs

An infinite collaborative canvas for sticky-note brainstorming, diagramming, and product planning.

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

Keep rich-text or code notes in a hierarchical tree stored in a single database or file collection.

A portable C library and reference for loading and rendering fonts.

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