openERP is written in Python and widely used. As far as I know there is some Python used in Gimp and Blender. For commercial desktop software, Windows is still

openERP is written in Python and widely used. As far as I know there is some Python used in Gimp and Blender. For commercial desktop software, Windows is still the major market. Cross-platform development costs are far greater than the value of the small increase in target market size.