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://freely.modspil.dk/x62t5plbgr/62t-reference
https://blog.librescrum.org/js558s3hac/js55-reference
http://blog.cyberia.club/x9u9uwx5vo3/9u9u-reference