Here's a little program I decided to make to enjoy all the newgrounds Art, Movie and Audio portal content on your XBMC/Kodi setup!
If you go to the plugin settings you can login with your credentials to view adult content, and you can adjust any of the filters in there as well.
http://s13.postimg.org/yhn9jljg7/xbmc1.png
http://s11.postimg.org/srrte9aub/xbmc2.png
http://s18.postimg.org/5vjq0kt7d/xbmc3.png
http://s7.postimg.org/ks34805vv/xbmc4.png
http://s27.postimg.org/ybpyvcrab/xbmc5.png
http://s18.postimg.org/cfr3knwm1/xbmc6.png