For small businesses looking for desktop accounting software
With AccountEdge, business owners can organize, process, and report on their financial information so they can focus on their business. Features include: accounting, integrated payroll, sales and purchases, contact management, inventory tracking, time billing, and more.
gShop is a complete point of sale application that can be customised to suit most types of businesses.
Uses gnome / glade and includes e-commerce connections.
The Open Conversion Toolkit converts files from one type to another
OCT ("Open Conversion Toolkit") is a set of programs for converting arbitrarily many files from their own file formats to others.
It includes a simple command-line program for converting, as well as a convenient wxWidgets user interface.