Of course, it needs to be Open source, that's the catch.
Does it really?
Yeah, to get included, probably*. But if I was going to release Photoshop for Linux, damned if I would release the source. (See also proprietary nature of CMYK standard noted above.) There are applications that make sense to market and sell closed source - usually ones built around selling shrinkwrapped boxes. The OP is just asking for a dirt simple devkit that lets him squeeze out linux binaries that can be installed without editing sources.list. You know, like that double-clicky, drag-n-droppy thing that Apple does.
*for reals? Is my understanding of how distros and synaptic/etc work flawed? Feel free to correct me.