These are usually done on iPhone or on a Bamboo Fun (Wacom tablet) with some of the following software: Corel Painter, SketchBook Pro, PhotoShop Elements, Picasa editor. Some are traditional drawings (pen, pencil paper notebook etc). All my public images are also on Flickr: http://www.flickr.com/photos/tiogegeca/
tiogegeca@gmail.com
Abraços,
rogerio