I can reccomend a few cause i have the note 2, master xD

Picsart or PS Touch

Picsart is a free one with decent editing tool and things like layers

Photoshop touch is like a mobile version of ps and is worth buying if you intend to do a lot of art on your galaxy :3

my thinking is maby do some scetching on it when im stuck places

hit me on skype ^.^