IGD implements a variety of generating tools for every type of gear. Straight, parabolic, or circular profiles can be considered for the generating tools, allowing tip and root reliefs to be provided in order to improve the process of tooth loading and unloading during the cycle of meshing. Root and tip reliefs are fundamental to minimize contact stresses along the cycle of meshing. The blades of the generating tools are designed considering not only the active part but also the blade edge that will generate the fillet of the gear teeth, allowing the accurate determination of fillet stresses.