1)   Machinist Calculator 5.0.38
Machinist Calculator has been developed to quickly solve common machine shop math problems such as trigonometry, speeds and feeds, bolt circles, and much more. Get your free demo now.

 2)   Machinist MathGuru 1.0.90
Solve common trade maths problems in a whiz with Machinist's Math Guru software. This inexpensive, easy to use utility is designed primarily for students, machinists, toolmakers and CNC programmers.