Link-O-Rama! (Possible adult content)
http://www.artmodeltips.com/poses - A plethora of poses to peruse! So essential!
http://jonasdrawsstuff.com/links-for-artists - Jonas has a lot to offer, check it out!
Victorian girlyboy gay pornography! <3
http://oglaf.com - I've never seen fantasy, pornography, and hilarity executed so perfectly!
http://dimespin.tumblr.com/resources - Ginormous list of artist resources!