Pixel Art tutorials

http://www.hongkiat.com/blog/pixel-art-tutorials/

http://makegames.tumblr.com/post/42648699708/pixel-art-tutorial

http://www.pixelprospector.com/the-big-list-of-pixel-art-tutorials/

http://design.tutsplus.com/tutorials/kandi-runner-create-a-pixel-art-sprite-from-scratch--cms-21705

http://www.slant.co/topics/1547/~pixel-art-sprite-editors

https://www.reddit.com/r/gamedev/comments/28vv5w/aseprite_an_amazing_offline_pixel_art_editor/