GnuCash – Open Source Accounting Software: While not quite ready for business it does work well for personal finances. Keep your eye on this though because the rumor is that they are making it ‘business ready’ and it will be a great, free competitor to Quickbooks(TM) if they do.
“If you’ve been looking for a way to manage your personal finances using Free Software, you’ve found it! Designed to be easy to use, yet powerful and flexible, GnuCash allows you to track bank accounts, stocks, income and expenses. As quick and intuitive to use as a checkbook register, it is based on professional accounting principles to ensure balanced books and accurate reports. GnuCash is backed by an active development community and is blossoming into a full-fledged accounting system. Developed under the GPL, you have no need to worry about obsolescence: GnuCash will be there for you. ”