Database programming in small to mid-size peer-to-peer networks.
My main project to date was to design and implement a program to run a National (Australian) On-site computer warranty company.  It tracks warranties, repairers, suppliers, generates paperwork for a repair, reports ....  
I've also written a messaging system from the receptionists to the phone techs, etc.
Currently working on a computer quoting package, which takes users from quoting to after sales returns.