Secretly take snapshot of subject’s desktop screen and mail to you periodically. Handy surveillance tool.
Read and aggregate RSS feeds into a desktop application and optionally send them to Outlook for more convenient reading.
Build a Smart Client using Microsoft Office like automation model. Highly pluggable architecture that is much cleaner as separation of concern is maximized.
Save and quickly switch between multiple network configuration. When you have a laptop that you use at home and work, you can use this to quickly change between different network settings.