http://g.e-hentai.org/ - One of the largest communities on the web, it holds the work and forum of hundreds of independent artists.
https://www.fakku.net/ - An online publisher, FAKKU publishes hundreds of comics for independent artists.
http://www.deviantart.com/ - A hub and forum for independent artists across the world, easily one of the largest collections of private art on the web.
http://www.hentai-foundry.com/?enterAgree=1&size=1550 - Similar to deviant art, it is a more adult oriented gallery for independent artists.
http://www.furaffinity.net/ - The name says it all, it is a community for animal "lovers" and their respective artwork.
http://herpy.net/ - Similar to furaffinity, it is a more reptile oriented community. (P.S. Be sure to turn on the right filters when searching.)
http://rule34.paheal.net/ - The 34th rule of the internet, if it exists there is porn of it (and you can find it and its creators here).
http://luscious.net/ - More of a private and obscure community but, a nice community all the same. Some things you wont be able to find anywhere else.
http://pururin.com/ - A free online hentai manga and doujinshi reader, it is a gigantic collection of porn and an even bigger community supporting it.
http://www.drawntobondage.ca/ - No idea what this is...
http://orgymania.net/ - No idea what this is...
http://www.darknestfantasyerotica.com/ - Fanart for large online MMO's, includes also an extensive roster of people looking for erotic role-play.
http://thechroniclesofalexstrasza.com/ - A Russian-developed UT engine game that is basically story-driven 3D WoW porn with a controllable protagonist.
http://ellowas.blogspot.de/?zx=539de29b44a6b315 - The home of Ellowas, a retired WoW porn SFM gif maker.
http://www.azerothica.com/ - Simply put; a collection of World of Warcraft centered pornography.
http://www.theworldofporncraft.com/http://kawaiihentai.free.fr/http://worldofporncraft.blogspot.com/http://jizzart.net/http://wowxporn.com/http://rexxworld.com/ - All world of warcraft, no idea what they are...