Things I found online and keep coming back to.

Canvas UI

35+ open-source WebGL and WebGPU components for six frameworks.

canvasui.dev · components↗

Toolcraft

A starter kit for building your own AI design tools, from Pixel Point.

toolcraft.sh · components↗

libraries.dev

Jakub Antalik’s UI effects for AI apps, including the thinking orbs.

libraries.dev · components↗

Originkit

A free library of animated web components.

originkit.dev · components↗

pdfcn

Open-source PDF components in the shadcn/ui style.

pdfcn.dev · components↗

Beautiful UI

Copy-paste components for AI interfaces, from the studio Turbo.

beautifului.dev · components↗

loading.dev

A small React library of loading indicators by Jakub Krehel and Paul Faivret.

loading.dev · components↗