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://leetcode.com/u/e44449/
https://community.starnetlibraries.org/members/kj92lyddvr/profile/
https://demo.mycred.me/members/up2h2h/activity/