VoytPaintFree

App for Android, in which you can draw.

Tools:
-brush (takes into account the pressure of a finger or stylus, sketch style)
-spray
-eraser
-blur
-fill(solid and gradient)
filters (grayscale, negative, brightness selected color)
a-line (straight and Bezier)
-shapes (rectangle, ellipse and rectangle with rounded edges
-text

To zoom the image, use multi-touch.
There is a function to undo/redo (for free version only 4 times)

The maximum size of the image you want to edit 1280*1280

On tablets with Android 3.x (Honeycomb) is in full screen mode