Best UI/UX Design Open Source Tools in 2026

Silex

stars 2.9Kforks 671

Silex is a free and open-source website builder for professional web designers and no-code developers, offering visual creation and flexible CMS integration.

Website Builder No Code UI/UX Design+4

screenshot-to-code

stars 75.6Kforks 9.2K

Turn any design screenshot into clean, working code with AI

UI/UX Design Developer Tools Low-code+2

material-ui

stars 99Kforks 32.6K

Open source React components for Google's Material Design

UI/UX Design Developer Tools

Revyme

stars 104forks 9

Build stunning website, export your code anytime

UI/UX Design Graphic Design

page-agent

stars 28.9Kforks 2.6K

AI-powered GUI Agent for your website

AI Agents Customer Support Workflow Automation+2

design.md

stars 27.6Kforks 2.3K

Generate UIs effortlessly with AI.

UI/UX Design AI Coding Assistant Low-code+1

diagrams.net

stars 7.8Kforks 1.2K

Create portable diagrams without vendor lock-in

UI/UX Design Self Hosted Diagramming+1

Penpot

stars 59.4Kforks 4K

Open source collaborative UI design and whiteboard workspace

UI/UX Design Self Hosted Graphic Design

GrapesJS

stars 26.2Kforks 4.6K

Build drag-and-drop page editors inside your own stack.

UI/UX Design No Code Website Builder+2

Godot Engine

stars 116.4Kforks 26.5K

Free open source game engine for 2D and 3D development

Developer Tools Coding 3D Modeling+3

TypeUI

stars 1.8Kforks 134

CLI tool for managing design systems for Claude and AI tools

CLI UI/UX Design Developer Tools+2

UI/UX Design

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