Portable finance/checkbook software

I am looking for financial or checkbook software suitable for use on a USB flash drive. I was kind of surprised that I didn't find any of this type of software among those listed at PortableApps.com.
It seems like a natural to me: An application you can use to keep track of several checkbook accounts and carry it with you on your flash drive.
There are a number of software applications of this type available but I haven't found any that is specifically designed for use on a flash drive. Has anyone out there tried any of these apps on their flash drives? I'd like to get suggestions on which apps would be the best to try.