On Rosetta Code I have used the nicknames Toucan, Capra Hircus, Nochnix, Dinopis, ArchStat and Henddewin. I use mainly the Python programming language, since 2002. I also use Lisp, GAP, Maxima and Mathematica for playing with maths, and SAS, R and Excel/VBA for work. And Fortran, just for the heck of it.