I recently came across a new platform while browsing, and I was surprised by how smooth and fast the overall experience feels compared to others I've tried before, especially in terms of loading speed and usability
https://write.underworld.fr/kakwinty2qdn/kakwin-reference
https://blog.nemo.earth/popwini3vq99/popwin-reference
https://freely.modspil.dk/g6789toovww/g6789-reference