1)   MITCalc - Compression Springs 1.13
Geometric and strength designs of helical compression cylindrical springs loaded with static or fatigue loading. Application supports Imperial and Metric units, is based on ANSI, ISO, DIN standards and support many 2D and 3D CAD systems.
Spring, springs, cylindrical spring, compression spring, helical spring, EN 13906-1, DIN 2089-1, DIN 2095, static strength check, dynamic strength check.,

 2)   MITCalc - Torsion Springs 1.15
Geometric and strength designs of spiral cylindrical torsion springs loaded with static or cyclic loading. Application supports Imperial and Metric units, is based on ANSI, ISO, DIN standards and support many 2D and 3D CAD systems.
Spring, springs, cylindrical spring, torsion spring, spiral spring, EN 13906-2, DIN 2088, static strength check, dynamic strength check.,

 3)   MITCalc - Tension Springs 1.13
Geometric and strength designs of helical tension cylindrical springs loaded with static loading. Application supports Imperial and Metric units, is based on ANSI, ISO, DIN standards and support many 2D and 3D CAD systems.
Spring, springs, cylindrical spring, tension spring, helical spring, EN 13906-2, DIN 2089-2, DIN 2097, static strength check, dynamic strength check.,