1)   EMSolution Trigonometry short 3.0
84102 trigonometric problems from basic to advanced with fully explained solutions, related math theory and easy-to-use test preparation options

 2)   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.

 3)   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.

 4)   EMSolution Trigonometry Equations short 3.0
19292 trigonometric equations from basic to advanced with fully explained solutions, related math theory and easy-to-use test preparation options

 5)   FNA 1.31a
Multi-function calculator and unit conversion utility. Four modes of operation (statistics, trigonometry, base-n, and unit conversion). Many functions, formula entry mode. Up to 26 separate memory registers. Even includes periodic table of elements.

 6)   Numero 1.1
Numero is a calculator with some nice features. It has a text box that displays all of expressions and answers that have been calculated, and there is eye candy, such as fading in/out and customizable colors.