ExpenseIt is the best I've found:
http://www.cohosoft.com/product_deta...name=expenseit
Very clean interface and other necessary features; my favorite of which is the ability to use email to transfer data (either csv or html). The feature set from the site is listed below:
- Easy to use Interface
- Ability to define multiple trips
- Fast operation
- Generate trip reports
- Email option for data transfer
- Export CSV and HTML formatted files
- Trip summary screen
- Customizable labels
- Mileage cost calculations
- D-Pad button navigation
- Display sorting capability
- Data memorization feature