We use industry standard applications.
C++: Visual Studio
Excel, VBA for the structured finance course.
Latex: Miktex for taking notes (j/k on this front as I haven't seen anyone taking notes in latex yet. On the other hand, knowing tex syntax would help when you post mathematical formula on Quantnet)
Probably R,SAS on the Stat class.
In all, you probably sit in front of Visual Studio coding C++ for majority of your time.
That's been my experience in 2006-2007. Knowing Prof. Stefanica, you probably do more this year, not less of what I did.