1)   MITCalc - Bevel Gear Calculation 1.10
Geometric design and strength check of bevel gear with straight and helical toothing. Application supports Imperial and Metric units, is based on ANSI/AGMA and ISO/DIN standards and support many 2D and 3D CAD systems
Gearing, bevel gear, gear, tooth, toothing, design, strength check, helical, DIN 3971, DIN 3991,

 2)   MITCalc - Spur Gear Calculation 1.12
Geometric design and strength check of spur gear with straight and helical toothing. Application supports Imperial and Metric units, is based on ANSI/AGMA and ISO/DIN standards and support many 2D and 3D CAD systems
Gearing, spur gearing, gear, tooth, toothing, design, strength check, helical, ISO 6336, ISO 1328,