Teaching the concepts of population genetics can be tedious and boring if one does not have a feeling for the meaning of the "equations" and "numbers". Students at our department always have problems with these concepts. Therefore, I bundled some R scripts in the DemoPopQuanGen package, but students have a hard time installing the package and running the demos. I guess the learning curve is too steep for the majority of the students.
It seems that the PopG genetic simulation program can do more or less anything we need for the population genetics part. From now on I will use this nice program to show the concepts and I am sure students will like this more than R. Though, it is nice to be able to do some more fancy stuff in R, but one really needs at least some feeling about the programming.