Here's a list of Stata user commands I have found valuable:
Data manipulation
- eurostatuse - our Eurostat download plugin (get it through ssc install eurostatuse)
- usespss and savespss - spss conversion (be careful with variable precision and rounding)
- gsample - extended sample
Data cleaning
- copydesc - copy labels between variables
- nmissing and npresent - to check the number of valid and missing cases on a variable
- isko - conversion of ISCO codes into EGP and SEI
- kountry - ISO country codes
- labvars - extended labeling options
- varlab - extended labeling options
Calculations
- domin - decomposition of explained variance by regressors
- nldecompose - non-linear decomposition methods
- oaxaca - decompositions
- polychoric - for calculating polychoric correlation matrices and performing polychoric factor analysis
Output creation
- md - log file parser
- grc1leg - graph combine with 1 legend
- profileplot - plots with means on several variables
- markup - log file parser
- markdown - log file parser
- synlight - log file parser
- weave - syntax parser
I forgot why I found these useful
- quote - no idea
- results - no idea
- txt - no idea
