I tweeted this out earlier, but people are really excited about RStudio, an integrated development environment (IDE) that has the potential to make R coding and development a whole lot easier.
If you use R at all, you know how messy your desktop can get. There's a console, graphics devices, coding windows, etc. The R coding experience is very disjoint (although I have to admit I've kind of gotten used to it). For example, I have about five R-related windows scattered across my screen as I write this. I'm on a Mac so Exposé keeps it semi-manageable, but I imagine something awful on a Windows machine.
RStudio brings all of the R components into one place and keeps things nicely organized. Best of all, it's free and open and is available for all major platforms.
I haven't tried it yet, because you know, I fear change and stuff, so I'd love to hear experiences. First impressions? Experiences from the alpha users? Sound off in the comments.