TwistedBrush Open Studio is a free digital paint and photo editing Windows software package built from the powerful and easy to use TwistedBrush Pro Studio platform. TwistedBrush Open Studio is released as free software that will not expire and is not crippled.
Based off of TwistedBrush Pro Studio, most all the features of the Pro Studio version are included in Open Studio with the exception of features that allow for modification of brushes.