I have developed web based application which are being used to run complete companies.
The following are just some of the projects i have managed:
TMS - Telephone management system. Capture calls from the telephone system, apply costs, produce reports, alerts on calls over certain value/time etc
Stock Control - Manage stock for/from multiple locations, multiple prices.
Jobcard system - Allow sales people to open job card with instructions to factory to produce the goods. Fully automated.
Data aggregation - Collect data from various sources and compile reports based on predefined parameters