My workspace is based on the look of the panels on Paint tool SAI. I love SAI, but I don't want to have Windows on my computer right now, so it feels just as good, and the brushes are just as good like SAI.

Swatches: http://browse.deviantart.com/art/Copic-Marker-358-Swatches-251663486

Brushes: http://okami-rain.deviantart.com/art/Shading-Brushes-141672498