Hi! You probably want to go to //catstret.ch.
If you're looking for the web tools that used to be on subdomains of this site, like PKAwake or namegen, you will want to have a look at //irys.cc instead.
If there's something else you're looking for, you might be able to find it on //github.com/u1f408 or //sr.ht/~meowingirises.