GnuCash is a program for personal and small-business financial-accounting.
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 like double-entry accounting to ensure balanced books and accurate reports.
With GnuCash you can (but are not limited to):