PsychonautWiki (PW) is a community-driven online encyclopedia that aims to document the field of psychonautics (i.e. the exploration of altered states of consciousness) in a comprehensive and scientifically-grounded manner.
Our documentation includes an extensive content collection covering the scientific research and harm reduction practices relevant to hallucinogen and general psychoactive substance experimentation as well as other methods of exploring consciousness such as meditation, lucid dreaming, and sensory deprivation.
This information is presented alongside an integrated descriptive subjective effects index which is designed to facilitate analysis and sharing of non-ordinary states of consciousness via easily readable terminologies, descriptions, leveling systems, and example images (replications).
Erowid has been doing the exact same thing for three decades.
https://www.erowid.org/
Yeah but the site itself is just as old and not remotely mobile friendly. PW is modern and better organized, which helps a bunch when I'm tripping so hard that I can barely use my phone.
They are both very good but I used ero more for trip reports then anything else. I like to filter for new there.