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Auto Project Planner is an Open Source project management application for Windows, Linux and Mac operating systems. The software automatically calculates a proper project plan based on your effort estimations and the due dates you have in mind. A list of tasks and a list of employees can be defined. Tasks can be assigned to one or more employees. It is also possible to define a maximum percentage value an employee can/should work on a task. Public holidays, leaves, weekly working hours and some more parameters can be specified and are considered in the calculation. According to this input the software compute time plans by minimizing the MSE (mean squared error) between expected and computed end dates.