My tools changed quite a bit this year. I am using:

  emacs
  textmate2
  R
  python / pandas
  jupyter notebooks (python, R, julia kernels)
  c++
  Clojure
  Common Lisp
  
  linux on the server
  os x on my laptop
  ipad / prompt2 / pythonista / bluetooth keyboard

Almost all of my serious work is being done in either R or python right now, which is a big change from using more proprietary tools like SAS, Stata, and Matlab.

I think I might have been the last person on the planet to figure out that an iPad with a bluetooth keyboard in a coffee shop or library is a very productive work setup and that I do not need to lug my laptop everywhere.

We are living in a fantastic era and I just cannot believe the amazing free tools that are available for things like network analysis (NetworkX) and spatial visualization (ggmap).