I find knitr easy to use. They way it generates graphs and can output to pdf/html is really useful and is reproducible and easily shared. While essentially just

I find knitr easy to use. They way it generates graphs and can output to pdf/html is really useful and is reproducible and easily shared. While essentially just markdown + R code the code can point to data sets instead of having it embedded. It has a good set of graphing libraries (ggplot2, etc) too. I can see how this could be the killer app that gets social science research papers written and produced in knitr. I always thought IPython would take this crown but R/knitr is looking good. Have not used Shiny yet Edit:knitr not rdoc