FPowerLib (Fluid Power Library) is an application providing a quick reference library to the most used hydraulic and pneumatic components. These components are organized as i) basic symbols, ii) control elements, iii) conversion elements, iv) storage elements, v) regulation elements, vi) equations. In the first five sections the user has access to a description of the most common fluid power elements, along with its normalized symbol. Section vi) allows the user to perform basic calculations involving several topics like forces and velocities of cylinders, energy stored in hydraulic accumulators, flow in hydraulic pumps and flow in pneumatic and hydraulic valves. FPowerLib is therefore a useful tool to all who work or study Fluid Power systems!