This is an experimental drawing of "Autodesk Sketchbook Express", the free version of "Autodesk Sketchbook Pro" which you can download it from Mac App Store if you have any Mac OS computers. It has some primary tools that every raster graphics program has but somewhat lacks of a some functions compared to Photoshop. It also lacks of pressure sensitivity except pencil tool.
In this picture, this is Android-tan, my lastest OCs of wireless and mobile subject that I learn in this semester(I'm already a senior now, how fast!!!)
P.S. You can also download this program in iPhone, iPod Touch and iPad version for free but you have to pay if you want the Pro version in various prices depend on your devices.
Drawing and Painting: Autodesk Sketchbook Express and wacom intuos4