ProOnGo Helps Keep Receipts Organized

ProOnGo is a program for your Windows Mobile phone that helps you keep track of expenses and generate reports. Using your device's camera, you can record images of the receipt, fill out various fields in the database, including user customizable fields, and then export your reports in Excel (.xlsx) or PDF format, optionally including receipt images.

There is a list of supported devices on their page and there is a feature limited trial available. You can purchase it for $19.99