Personal and small-business finance manager
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.
track time spent, keep a diary, to-do list, generate reports, bills
GnoTime (formerly GTT, the Gnome Time Tracker) is a desktop utility for tracking the amount of time spent on projects, keeping a to-do list, maintaining a diary, and generating reports and invoices based on that time.
A GPL'd Point-of-Sale system, intened to be fully configurable, and able to interface with Gnucash. This project is currently dead, but may be revived if there is sufficient interest and some significant amounts donated. Anyone interested in working on