Interestingly enough almost all my coding has been in the browser since I've been using Tributary [http://tributary.io/] for D3 prototyping and RStudio Server for R (which is amazing if you haven't tried it)
Although I haven't used it yet, it's worth mentioning Shiny from the RStudio team http://www.rstudio.com/shiny/ which makes it pretty painless (so I hear) to create interactive R visualizations.