tptp reference
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://5.1.e.7.0.a.a.e.0.a.2.ip6.arpa/ff7gzqdus0/ff7g-reference
https://blog.kuba-orlik.name/nn55lvphxl/nn55-reference
https://mail.dakloifarwa.de/n76nm5oqdp/76n-reference