Citeads - advertising site, that maximally simplifying showing/adding/editing/searching ads.
Main functionality stored in Rules.
Moneyscript used for e-commerce.
Custom jquery code created that allow easy define Office (work) time.
Popup dialogs (login/register/password reminder, messages and so on) based on CTools are used with supporting multisteps.
Site was configured by me from zero point in Linode hosting service: setupping Linux