Spline

Spline is a 3D editor in the browser, but its real value is not the editor, it is the library. The Community section holds hundreds of ready-made interactive scenes from designers worldwide: a robot that turns its head to follow the cursor, a hero section made of reeded glass, hover-reactive boxes, typography that falls apart, streams of particles. It solves a common landing-page problem: you want live 3D visuals and have no 3D designer of your own.

The most interesting part is how you take a scene for yourself. Remix opens your own copy, where you change colours, text and animation speed to fit your brand, and export hands you a tag that drops into the page in two lines. Every piece shows its author and view count, so it is obvious which scenes people actually put to use.