Open source design tools
Free, hand-reviewed, and yours to keep. Every tool here publishes its source under a genuine open licence — no subscriptions, no lock-in, no vendor that can take it away.
Open source means the source code is public and licensed so anyone can use, study, modify and share it. For designers that translates into three practical things: no subscription, no licence audit, and no risk of the tool disappearing because a company was acquired or changed direction.
It also means trade-offs, and this page is honest about them. Open-source tools are frequently rougher around the edges, documentation is thinner, and support means a forum rather than a phone number. Every listing below states its drawbacks alongside its strengths — the same standard applied to every other tool in this directory.
Free alternatives to the tools you're paying for
Honest swaps — including where the open-source option genuinely falls short.
Inkscape handles most vector work well. Its weak point is CMYK print output, where Illustrator is still ahead.
Scribus does real press-ready output with CMYK and spot colour. The interface is dated, and there is no .indd import.
Penpot is the only credible open-source UI design tool, and it is self-hostable. Plugin ecosystem and real-time performance still trail Figma.
Penpot runs in the browser on any OS, which removes Sketch's macOS-only constraint entirely.
Darktable is the closer workflow match with cataloguing; RawTherapee renders slightly better but has no asset management.
Blender is genuinely competitive here — used in commercial production, not just as a budget option.
FreeCAD is parametric and capable, but its workflow is less polished and the topological naming problem still bites on complex models.
LibreCAD is 2D only and reads DXF, not DWG. Fine for drafting; not a full AutoCAD substitute.
Excalidraw for quick sketching, draw.io for structured diagrams. Both weaker on live multiplayer than Miro.
FontForge exports genuine production OpenType files. The interface is the hard part, not the capability.
Feature parity is close. Self-hosting is the real differentiator if scheduling data matters to you.
OpenToonz has genuine studio pedigree at Ghibli. Both are harder to learn than their price suggests.
Strapi and Payload for structured content APIs; Ghost if publishing is the actual use case.
OBS records at higher quality with no time limits, but has no hosting or sharing layer — that part is on you.
Open source Photoshop alternatives
There are two, and the right one depends on whether you are editing photographs or painting them. GIMP is the closest thing to a free Photoshop: layers, masks, retouching, filters and a plugin ecosystem two decades deep. It is genuinely capable, and its interface is its own thing rather than a copy of Adobe’s, which is the part most people bounce off. Krita is the painting half — brush engines, stabilisers, frame-by-frame animation — and for concept art and illustration it is not a compromise at all.
For photography specifically, the open-source answer to Lightroom is Darktable, with RawTherapee the more controllable of the two if you like turning every dial yourself.
One distinction worth keeping straight: Photopea opens PSD, XD, Sketch and Figma files in a browser with nothing installed, and Affinity is now free, but neither is open source. They are free to use, which is a different promise. The longer comparison, drawbacks included, is in Photoshop alternatives.
Open source Illustrator alternatives
Inkscape is the answer, and has been for years. Full SVG support, node editing, boolean path operations and bitmap tracing cover the vector work most people open Illustrator for, with no licence and no account. Two honest caveats: CMYK handling for print is weaker than Illustrator’s, and the interface will feel dated arriving from Adobe.
The rest of a vector workflow is not drawing. SVGO strips the bloat design tools leave in exported SVG, which is routinely the difference between a 40 KB icon and a 4 KB one. Lucide, Phosphor, Heroicons and Iconify cover icons under permissive licences, so you are not redrawing something that already exists.
The full comparison, including the paid options and what each one costs, is in Illustrator alternatives.
Browse all open-source tools
Filter by discipline and pricing. The Open source toggle is already applied.
123 tools
Ant Design
Enterprise-focused React component system with exhaustive data-display components.
FreeAppwrite
Open-source backend platform — auth, database, storage and functions.
FreeAstro
Open-source web framework that ships zero JavaScript by default, built for content-heavy sites.
FreeAstro Starlight
Documentation site framework built on Astro, fast and accessible by default.
FreeAudacity
Long-established open-source audio editor for recording and cleanup.
FreeBambu Studio
Slicer with automatic calibration and multi-colour printing management.
FreeBase UI
Unstyled, accessible React components from the MUI team.
FreeBlender
A free, open-source 3D suite that has evolved into a professional-grade tool at zero cost. Remarkably capable for…
FreeBlender Cycles
Physically-based path tracer, developed with Blender but usable standalone.
FreeBlockbench
A free, browser-and-desktop low-poly 3D model editor and animator, originally built for game assets like Minecraft mods.
FreeBootstrap
The long-standing CSS framework with a complete component and grid system.
FreeBulma
CSS-only framework built on Flexbox, with no JavaScript dependency.
FreeCal.com
Open-source scheduling infrastructure — a self-hostable Calendly alternative.
FreeCarbon Design System
IBM's open-source design system with React, Angular, Vue, Svelte, and web components, plus tokens, icons, grids, and data-viz…
FreeChakra UI
Accessible React component library with a clean styling API and strong defaults.
FreeCircuitJS1
A browser-based electronic circuit simulator with live, animated schematics — build a circuit and watch current, voltage and…
FreeComfyUI
Node-based interface for building reproducible image generation pipelines.
FreeContinue
Open-source AI coding assistant for developers using VS Code or JetBrains, supporting 100+ local and cloud models for…
FreeCura
The most widely used open-source slicer for FDM 3D printing.
FreeD3.js
Data-driven document manipulation — the foundation of most custom web data visualisation.
FreedaisyUI
A component library for Tailwind CSS that adds semantic class names like btn and card, so you write…
FreeDarktable
Non-destructive RAW photo workflow — an open-source answer to Lightroom.
FreeDashboard Icons
A curated, searchable collection of 1,800+ icons for services, apps and tools, purpose-built for dashboards and directory sites.
FreeDocusaurus
Meta's documentation framework with versioning and localisation built in.
Freedraw.io (diagrams.net)
Diagramming for flowcharts, wireframes and architecture, with no account required.
FreedrawDB
Free, browser-based entity-relationship diagram editor with one-click SQL generation — design a schema visually and export working SQL.
FreeEleventy (11ty)
Static site generator with no client-side JavaScript framework attached.
FreeExcalidraw
Excalidraw is a free, open-source whiteboarding tool for sketching diagrams and flowcharts. Simple, fast, and no sign-up required.…
FreeFeather Icons
280 minimal open-source icons on a strict 24×24 grid.
FreeFlat Icon Foundry
A browser-based workspace for browsing and generating consistent flat icons across thousands of organized subjects and categories.
FreeFlowbite
Tailwind component library with matching Figma files.
FreemiumFontForge
Long-standing open-source font editor for drawing and generating typefaces.
FreeFramer Motion
Production animation library for React with a declarative API.
FreeFreeCAD
FreeCAD is a free, open-source parametric 3D CAD tool for product design, mechanical engineering, and prototyping. Parametric modeling,…
FreefreeCodeCamp
Free open-source nonprofit platform: courses, projects, and free certifications in web development, Python, and data science for self-taught…
FreeFreeFarmhouse
Free open-source traditional farmhouse blueprints — American Farmhouse, Extended, Southern and Backyard ADU cottages — with downloadable CAD…
FreeGhost
Open-source publishing platform with native newsletters, memberships, and paid subscriptions.
FreemiumGIMP
GIMP is a free, open-source image editor offering photo retouching, illustration, and image manipulation. Powerful alternative to Photoshop…
FreeGlyphr Studio
A free, browser-based font editor built for hobbyists and typeface design beginners — draw glyphs and export a…
FreeGodot Engine
Open-source game engine increasingly used for interactive design and prototyping.
FreeGraphite
A node-based 2D design application for vector graphics, digital art and real-time motion graphics — a genuinely ambitious…
FreeHeadless UI
Unstyled, accessible component primitives from the Tailwind team, for React and Vue.
FreeHeroicons
Icon set from the Tailwind team, in outline, solid and mini variants.
FreeHugo
Static site generator known for extremely fast build times.
FreeIconify
Unified access to over 200,000 open-source icons from 150+ icon sets.
FreeIconoir
Open-source icon library with over 1,500 icons and no licensing conditions.
FreeInkscape
Free, open-source vector editor with full SVG support.
FreeJSPaint
A faithful, browser-based revival of classic MS Paint with modern extras — free, no account, no install.
FreeNo tools found
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What the licences actually mean
“Open source” is not one thing. The licence determines what you can do with the tool’s output and, if you ever build on the code, what you owe back. For most designers this rarely matters — but it matters a great deal if you embed a tool in a product you sell.
| Licence | In plain terms | Watch out for |
|---|---|---|
| MIT / ISC / BSD | Do essentially anything, including using it commercially and in closed products. Just keep the copyright notice. | Nothing significant. The most permissive category. |
| Apache-2.0 | Same freedoms as MIT, plus an explicit patent grant that protects you from patent claims by contributors. | You must state what you changed if you distribute a modified version. |
| GPL-2.0 / GPL-3.0 | Free to use for any purpose, including commercial work. Anything you create with it is entirely yours. | If you distribute modified versions of the software itself, that code must also be GPL. |
| LGPL | A softer GPL. You can link it into closed software without opening your own code. | Modifications to the library itself still have to be shared. |
| AGPL-3.0 | GPL extended to cover network use. | The strictest here. If you run modified code as a hosted service, you must publish those changes. |
| MPL-2.0 | File-level copyleft. Modified files stay open; the rest of your project doesn’t have to be. | A middle ground — less demanding than GPL, stricter than MIT. |
| CC0 | Effectively public domain. No conditions at all. | Used for assets rather than code. Trademark law still applies to logos regardless of licence. |
The short version for most designers: if you’re using these tools to produce design work — artwork, layouts, models, video — the licence places no restriction on what you make. Your output is yours in every case above. Licence obligations only begin when you redistribute or host the software itself.
One thing worth stating clearly: source-available is not the same as open source. Several well-known tools publish their code under licences that restrict commercial use or competition — Business Source Licence, Sustainable Use Licence and similar. Useful software, often free, but not open source. Those tools are listed elsewhere in this directory and deliberately excluded from this page.