AvancePaint is a freeware complete paint program designed with a unique intuitive user interface that makes absolutely easy to learn and use. It is powerful enough to suit the most advanced user and yet simple enough to please the beginner.
AvancePaint is FreeWare (Free-Edition). No registration required.
Some of the features:
Author’s Website: http://users.belgacom.net/rgs/avancepaint.htm
Screenshots (Click to enlarge):