Stata Commands

Here are several sites that have Stata commands you may find useful (by no means an exhaustive list):
University of Chicago, Department of Statistics

University of Oregon, Department of Economics (opens to PDF)

Philip B. Ender, UCLA Academic Technology Services

David Glidden, UCSF Department of Biostatistics and Epidemiology Tips and Tricks for Your Analysis Project (opens to PDF)

There are some great examples and downloads on UCLA's Academic Technology Services web site (