Here is a link to Grimoar.cz website which has some useful texts for perusing the Occult and to increase and strengthen the Cthulhian Current.
There is also ChaosMatrix.org which is a classic and I know many here have already visited this particular site due to its amount of previous Cthulhu studies in Esoteric study.
There is also VK.com fresh from Russia who has a share site full of texts, with a search engine and some interesting contemporary texts available.
If you have or know of any site which you wish to share knowledge and studies, please do. I would love to expand our base in Esoterica.