R/simcross is an R package for simulating and plotting general experimental crosses.
You can install R/simcross from CRAN:
A vignette describing the use of the package is available from within R (and also here). Load the package and then use the vignette function.
This package is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 3, as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU General Public License for more details.
A copy of the GNU General Public License, version 3, is available at https://www.r-project.org/Licenses/GPL-3