I have very basic knowledge of statistics.
I use R exclusively. Typically, I do the usual descriptive stats on behavioral experiments and mixed-effects models for hypothesis testing.
I've also done a little bit of data filtering (median) and smoothing to clean up noisy formant/fundamental frequency/intensity parameters generated by the Praat software (acoustics of human speech) to help automate speech (Klatt) synthesis.
Recently, I've been looking at multiple regressions on mutual fund returns for fun.