What I did is buy a cross platform database program called Filemaker. It takes some real study to get the full hang of creating really useful stuff on your own, forget what the box cover says, it is not all that user friendly at first. But once I used it enough it started getting a lot easier. (Like Autocad was). Now I can make my own tracker, or gas/mileage record keeper, or flat rate book or whatever I can dream up. Works for Windows, Mac, or LInux.
http://www.filemaker.com/
