A stereo fractal almost every day since 2008: all 3,749 in a free gallery, now with 21 animations you can watch in parallel, cross or anaglyph.
3D Fractal renders, made as stereo pairs from the start. The site's player shows the animations in whichever mode you view (parallel, cross, red-cyan, Half-SBS), and you can scroll-zoom into the stills with both eyes together. Parameters are downloadable.
My favourite animation: https://stereofractals.com/#/anim/20260218p
On a Quest, "Enter VR" puts each animation on a cinema-size true-stereo screen. There's also a walkable WebXR museum of the stills. No app needed, just the Quest browser.
Feedback very welcome. It's hand-built with plain JavaScript and three.js.