1)   Calculator Prompter 2.2
Calculator Prompter is a math expression calculator. Calculator Prompter has a built-in error recognition system that helps you get correct results. With Calculator Prompter you can enter the whole expression, including brackets, and operators.

 2)   Smooth Operators 1.0
Smooth Operators is a complete solution for learning, practicing, and testing the order of operations. An interactive lesson teaches concepts. Practice by clicking operands, or test by typing in answers. Prepare students for algebra and higher math.

 3)   RealTimeQuery 3.2
Spanto Soft SL has released RealTimeQuery v. 3.2, a simple Windows application that lets you add sophisticated real-time operator support to your web site

 4)   Calculate Mathematical Expressions Software 7.0
Evaluate math expressions with sin, square root, pi, factorial, etc.

 5)   CrazyMath 1.2
Allows you to enter sequences of expressions as you would write them on paper.