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.
GnuLedger is a Web-based accounting system. It has all of the functionality that an average home user needs to manage their finances. Its backend is a MySQL database, and it currently uses a web browser front-end. It has been tested using Internet Explorer, Mozilla, Opera, and QNX's Voyager.
PCash is a simple checking account and budget management application for PalmOS. It features multiple checking accounts, payable transactions to record future expenses or income with known amounts, budget transactions to record future expenses or income with estimated amounts, showing posted/reconciled bank balance, current bank balance, and a running budget balance, auto completion of party (payee, source) for quick entry of transactions, and automatically incremented check numbers.
Invoice Me is an online invoicing system, with automatic billing status indicator. With the correct IDs, customers may search their own invoices, and view the payment status (with an option to hide paid invoices). It features search, add, edit, and delete admin interface. When creating a new invoice, the administrator can opt to email a copy of the invoice directly to the customer. Viewers can print the invoices easily via a Print Mode.