I'm selling a piece of property to someone with a seller-financed loan -- so I make the money from the power of compound interest instead of a bank. We've got lawyers handling the paperwork for the transaction. However, I've never been a loan shark before. Suggestions for financial software to manage the loan so I can enter payment amounts and dates and such and keep the magic of compound interest accurately compounding? I'm platform agnostic among OSX, WinXP, and various linuxes. I prefer something that's actual software instead of a service that I have to keep paying money for (Quicken and your expiring ability to download activity, I'm looking at *you* right now).