Agreed programming wouldn't be a monumental task, but there are lots of potential issues that come into play if you want to build a real GAAP Compliant accounting system with subledgers, control accounts, and transaction controls.
Not one of the accounting systems I have tested is a 'real' accounting system that could be used in an industry.
From my search only Easy Ledger offers subledgers, and I haven't tested transaction controls of it yet.
Building a good reporting and budgeting system might take same time to get it nice would be a bonus. Since most of the software I have tested, reporting is the weakest area.
Will keep testing and let you all know.
Any other accounting software out there???