Mecabricks
Mecabricks is an online tool to build, render and animate Lego in your browser using Three.js. In 2012, Nicolas Jarraud (online alias "scrubs") released the first version of Mecabricks throughout it's lifetime but especially in 2020 it received several updates bringing about new features such as a tool to animate or the mosaic tool. Mecabricks is particularly popular for it's ability to export models directly to blender for realistic rendering and it's large library of models.