Least week I posted about Tripcatcher a Google Maps based mileage logger for the UK. MileageSheet provides a very similar service for Ireland.
MileageSheet allows you to manage mileage rates, subsistence rates and expenses. The application allows the user to create routes and record journeys. It can then calculate distances and work out the mileage expenses.
MileageSheet can record employee information that is required by the Irish Revenue Commissioners and keep track of their expenses. It can also review employees' mileage sheets and the amounts payable according to their assigned schemes.