Posted by: Anonymous
on October 13, 2007 07:43 PM
Many libraries or frameworks have both opensource "community" edition and a proprietary one and continue their expansion on the market which use dual licence style proprietary or open source.
Xara should take a look at Qt which evolve from a restricted licence QPL to to a much more liberal one GPL.
Another example OpenInventor/Coin3D. And the price for a proprietary licence is not small, which mean a lot of buyers are interested.
[Modified by: Anonymous on October 13, 2007 07:50 PM]