billingtracker pro is time billing and invoicing software for service industry professionals such as lawyers, engineers, accountants, programmers, pc technicians, and consultants. anyone who bills time and projects, and demands ease of use will enjoy billingtracker.

gipals32 is a linear programming library offering a simple and reliable way to solve the linear programming tasks arising in logistics, transportation, oil refinery, financial and many other practical applications to maximize profit or minimize costs. the library can easily find a solution or state a solution doesn't exist for any kind of linear programs with an unlimited number of variables and constraints.