I wrote an open source application to track bills. I'm also in the process of writing an open source double entry system using the same framework. I like the level of control it gives me. Basically if I don't like something I just change it and I have no one to complain to but myself.

What about cloud computing, is anyone using it for their financials? I've just been reading how it's growing in popularity because it's a cheaper way of organising your filing system and managing your financial data, you simply give your accountant access. But some people are questioning the security of the system for financials. Is anyone using it?