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://community.openpreservation.org/user/m54dnufa
http://www.askmap.net/location/7896153/yuenan/x69dnokrhh
https://community.oncord.com/user/yb62bjth