Category
Shared canvases for interface design, diagrams, and visual thinking.
19 products, 16 Projects: 14 open source, 1 source-available, 1 unresolved-license
Collaborative interface design in the browser
Figma moved interface design out of single-user desktop files and into a shared document, and the industry reorganised around it. Multiplayer editing, comments in context, and a link that always shows the current state changed how design and engineering hand work to each other.
Collaborative whiteboard with a hand-drawn look
Excalidraw's sketchy rendering is not decoration. Diagrams that look provisional invite comment, where a crisp vector diagram signals a decision already made, so it is unusually good at the early part of a design conversation.
Commercial game engine with the widest platform reach
Unity's advantage is distribution. Console certification, mobile export, XR headsets, and the middleware ecosystem around them are all solved problems, which is why studios keep choosing it even after several rounds of unpopular licensing changes.
Infinite whiteboard for workshops and planning
Miro is the canvas most distributed teams reach for when the work is thinking rather than producing: retrospectives, service maps, story mapping, and anything else that used to need a wall and sticky notes.
Free 2D and 3D game engine with no royalties
Godot ships a complete engine, editor, and export pipeline under the MIT licence, which means no royalties, no revenue thresholds, and no licensing conversation before a project starts.
Text-defined diagrams: flowcharts, sequences, and Gantt in Markdown
Mermaid is a JavaScript tool that renders Markdown-inspired text into flowcharts, sequence diagrams, and Gantt charts, rendered natively in Markdown hosts such as GitHub.
Documents, whiteboard, and database in one canvas
AFFiNE puts a document editor and an infinite canvas over the same content. A page can be read as a document or arranged spatially as a whiteboard, and edits in one mode are edits in the other.
Infinite canvas SDK for building whiteboard apps in React
tldraw is an infinite-canvas SDK that gives any React app a whiteboard with drawing, shapes, rich text, multiplayer sync, and a runtime API for custom tools.
Design and prototyping built on open web standards
Penpot stores designs as SVG and uses CSS layout primitives - flex and grid - as its layout model, so what a designer builds maps onto what a developer implements rather than needing translation.
Free database diagram editor that turns ER designs into SQL
drawDB is a free, open source database diagram editor that turns entity-relationship designs into SQL for MySQL, PostgreSQL, SQLite, and more.
Free open source vector editor with a procedural node graph
Graphite is a free, open source alpha vector editor that runs in the browser with no account, pairing layer tools with a parametric node graph.
Open-source no-code engine for 2D, 3D, and multiplayer games
GDevelop is an open-source, no-code game engine that builds 2D, 3D, and multiplayer games with visual events instead of programming.
Open-source visual editor for designing React apps with AI in real code
Onlook is an open-source visual editor for designing React and Next.js apps with Tailwind CSS in the browser DOM, with AI assistance and code you own.
Free C# framework for cross-platform 2D and 3D games
MonoGame is a free, open-source .NET framework for building desktop, console, and mobile games in C#, re-implementing the discontinued Microsoft XNA API as code-first building blocks with no scene editor.
Open-source, AI-native interface design editor
OpenPencil is a free, open-source interface design editor that opens Figma files and keeps every file on your own machine.
Security-first diagramming online, on desktop, or self-hosted
draw.io is a free diagram editor for flowcharts, network diagrams, and whiteboards that runs in the browser, on the desktop, or self-hosted.
Open-source prototyping with built-in usability testing
Quant-UX is a free, open-source tool for building interactive prototypes, running usability tests with real users, and analyzing results with heatmaps.
Open-source design canvas with forms and database
Grida is an open-source design platform that pairs a Figma-style vector canvas with customer-facing forms, a Postgres-backed database, and a content backend for designers and frontend developers.
Visual database explorer that turns schemas into searchable ER diagrams
Azimutt is a database exploration tool that renders a live schema as an entity-relationship diagram and lets developers search tables, trace relations, and document what they find.
19 results