Selected modules from the UCLA Stat Consulting Group's Stata 11 tutorials.
Stata has both command line and point-and-click interfaces, with an intuitive syntax.
It comes in different flavors based on capabilities: Stata/SE (up to 32,767 variables) and Stata/IC (up to 2,047 variables).
The Stata community has developed numerous ado files that add functionality to Stata. Below are listed ado files that import data into Stata automatically.