Nebula is a WebGL based particle system designer and engine for three. It’s available for desktop and its open source counterpart three-nebula.
With Nebula, you can create eye catching particle systems, save them as JSON and render them in any website or app that supports WebGL using three and three-nebula. Particles can be rendered direct to the GPU making for some extremely performant effects.
At present the app is in alpha and there may be issues, from UI bugs to performance problems.
Check out the release notes.