Closed-source non-free ParallelR ?
Also, I'm confused about your dimissal of the MCE example. ?If that code was a derivative work of R, how could it swap a GPL license for the BSD? ?I didn't think such a switch was possible. ?If it was, I'd imagine a lot more use of it, as a quick front project could make GPL software into BSD software after which all changes could go on behind closed doors.
And there are certainly many existing R packages with non-free/non-open licenses: http://cran.r-project.org/web/packages/ff/LICENSE http://cran.r-project.org/web/packages/minpack.lm/LICENSE http://cran.r-project.org/web/packages/rngwell19937/LICENSE http://cran.r-project.org/web/packages/SDDA/LICENSE ... Found with http://www.google.com/search?q=site:cran.r-project.org+cran+%22file+license%22 Hadley