GnuCash is a personal and small-business finance manager with a check-book like register GUI to enter and track bank accounts, stocks, income and expenses. GnuCash is designed to be simple and easy to use but still based on formal accounting principles.
Rubrica is an address book for GNOME. It allows you to add personal data (name, surname, address, etc.), Web links, email addresses, ircs, telephone numbers, job information (company where contact works, company infos, contact's assigment, etc.) and notes