GBonds is a savings bond inventory program for GNOME. It allows you to track the current redemption value and performance of your U.S. Savings Bonds and keep a valuable record of the bonds you own. Gbonds is similar in functionality to "Savings Bond Wizard" for Windows distributed by the U.S. Treasury.
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. It is backed by an active development community and is blossoming into a full-fledged accounting system.