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
http://www.invelos.com/UserProfile.aspx?Alias=ih77
https://peace.nodebb.org/user/vv55kk
https://mooc.rtu.lv/members/vip966797/profile/