- c — Google calculator
- ety — Etymology
- g — Google search
- gc — Google results count
- gcs — Google results count, multiple terms
- img — Google image search
- in — Schedule an event
- news — Google news search
- npl — Current time
- py — Python evaluation
- sleep — Sleep test function
- suggest — Google suggest
- title — Title of a web page
- to — Message a user
- tr — Google translate
- tw — Twitter
- u — Unicode search
- upper — Convert to uppercase
- url — Show recent link
- version — Saxo version
- wa — Wolfram|Alpha
- wik — Wikipedia search
And some more admin commands.
Read also about making your own commands.