Crossover 4.2 Runs Quickbooks on Linux
Memorize writes "What's keeping you from switching your desktop to Linux? Linux has been able to run MS Office under Wine for a while now, but Codeweavers just announced Crossover 4.2 with support for Intuit Quicken and Quickbooks. I know that lack of a good bookkeeping app (other than Gnucash) has been keeping a lot of people from switching. It supports iTunes, too. What else do you need?"
And it runs on Windows, Mac and Linux natively. None of this WINE nonsense. Clicky.
Not affiliated with them by any means, just a happy customer. I'm planning on eliminating AccPAC and MiSYS at my office for their Appgen Custom Suite since it too is multiplatform, modular and you can get a developer license without the hassles that AccPAC has.
For business accounting on Linux there is Quasar, which is a "full function, stand-alone business accounting package." It has both a GPL and commercial licenses.