Knitr is super cool, I've used it for a few small projects now. Also love how R-Studio integrates it. R Studio, along with the greater R ecosystem, is by far

Knitr is super cool, I've used it for a few small projects now. Also love how R-Studio integrates it. R Studio, along with the greater R ecosystem, is by far the nicest programming environment I've ever used (although it is somewhat specialized - excels mainly in dealing with data as opposed to creating apps).