Zephyr Basecamp is a functioning GTK frontend and PostgreSQL backend enterprise project that gives small and midsize businesses the same level of inventory, order entry, sales tracking, and accounting functionality as would be expected from commercial applications. It has interfaces for both X11/GNOME/Linux and Windows.
eLawOffice is a program to manage lawyers' activities, audiences, documents, agenda, and accounting. Documents can be created and exported with HTML templates, and changed with Netscape, OpenOffice.org, or MS Word. The program was originally designed for use with the Italian language and Italian accounting.