Excel:
Built-in functions (SUPER useful!)
Search/sort/manage list data
Simple conditional formatting
Formula-driven conditional formatting
Introduction to writing excel macros
Pivot tables
Basically, anything here
Access: almost everything you could need to begin can be found here
MATLAB:
Mathworks
More tutorials from UMich
Psychtoolbox: tutorial here and basic code that works and you can edit here
Matlab/Psychtoolbox for beginners from Rutgers
Python:
Free intro programming book