Visualizing distributions of data
nbviewer.ipython.org
nbviewer.ipython.org
There was one about detecting bubbles in liquid for the purposes of reducing spilling that was very interesting
http://nbviewer.ipython.org/github/soft-matter/trackpy-examp...
I just downloaded IJulia (IPython for Julia) and having been playing around with it.
I knew that it exists for some time (and I had it already installed) but only today I rediscovered it as a really useful tool for default plots in my data analysis / data exploration.