Free
Tool
AI & Assistive Tools
OpenDesign
An open-source design workspace for building prototypes, landing pages, dashboards, slides, and HTML video with your own coding agent.
#open-source#design#prototyping#coding-agents
prototyping
6 free resources on this topic. Everything here is free and hand-picked. You can also search within this topic.
Free
Platform Tool
Marketing & Platform Tools
Figma
Design and prototyping tool used across the industry, with a free Starter plan that covers design files, FigJam whiteboards and slides. Useful for portfolios, pitch decks, wireframes and simple brand assets.
Why I recommend it: Free Starter plan has limits on the number of files and collaborators, and some features (Dev Mode, advanced Figma Make usage) sit on paid seats. Enough for one person building a portfolio or deck without paying.
#design#prototyping#portfolio#wireframes#pitch-deck#collaboration#free-tier
Free
Tool
AI & Assistive Tools
Floot
A no-code app builder that works inside Claude and ChatGPT, turning a plain description of an idea into a working product.
Why I recommend it: Useful if you want to test a business idea as a real, clickable product before you spend money on it.
#ai#no-code#app-builder#free#startup#prototyping#tool
Free
Tool
Entrepreneurship & Free Tools
Replit
A free-to-start platform that builds a working app or website from a plain description, with everything running in the browser and no setup.
Why I recommend it: Good for getting a first version of an idea in front of people this week.
#ai#free#no-code#app-builder#startup#prototyping#tool#side-project
Free
Tool
AI & Assistive Tools
tldraw Chat Starter Kit
A free working example of a chat app where you can draw to give an AI assistant visual context, with the code to build your own.
Why I recommend it: A quick way to see how visual context changes what an AI assistant understands.
#ai#free#open-source#prototyping#whiteboard#developer-tools#tool
Free
AI Tool
Entrepreneurship & Free Tools
Magic Patterns — AI design and prototyping
An AI design tool for product teams: turn a prompt, product requirement, or screenshot into high-fidelity UI, match existing design tokens, and explore directions before committing engineering time.
Why I recommend it: For founders without a designer: make something visual before you ask anyone to build it. The free tier is enough to test an idea.
#ai#ai-tool#design#prototyping#product#tool#startup#founders#entrepreneurship#software-engineering#free#no-code#ux