(This article was first published on Shige's Research Blog, and kindly contributed to R-bloggers)
I obtained a free academic copy of the InferenceR, which is a R IDE for Windows. I has several interesting features such as a visual debugger. It is definitely worth some further exploration. Of course, the problem (and the only problem for now) is that it is Windows-only, cannot run it on Linux.
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Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).