Penpot

Design interfaces and prototypes on an open-source platform teams can self-host.

Community find. Not personally tested by Ash.

What it does

Penpot is an open-source interface design and prototyping platform. Its layout tools use web concepts such as flex and grid, giving designers and developers a shared way to discuss structure.

When to use it

You want to design and discuss responsive interfaces, including in a team that needs a self-hosting option.

What you need: Access to Penpot and a simple screen to recreate.

Try a small build

A suggested exercise to help you evaluate the resource.

Create a board for a profile settings screen with a heading, two fields, and a save action.
Use layout controls to define alignment and spacing, then resize the board to see which decisions hold up.
Turn one repeated element into a component and connect two screens in a prototype.

You should end up with: A small responsive layout with a reusable component and a clickable flow.

Keep in mind

A prototype communicates intent; production behavior and accessibility still need implementation and testing.

Go to the source

Follow the official instructions for current setup steps and supported features.