hphp 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://wiwecns5.kc2g.com/z35mn9zwsn/35m-reference
https://scrolls.anduin.net/h29szikaff/29s-reference
http://write.tildeverse.org/c111pmb8ql/c111-reference