The following short video provides an instructive demonstration of RStudio's many features and capabilities.
Users of R (Project R) will find the capabilties that RStudio adds to R, useful, if not essential. In fact, I cannot imagine using R without RStudio as the user interface. I have also experimented with Revolution R (Revolution Analytics), which is a powerful commercial alternative to RStudio. However, RStudio's free price tag is hard to pass up.
Follow the link below to learn more about RStudio.
RStudio is "alive and well" on my desktop...