ABACUS
3.0 

A calculatorlike interface to the formula editor that is built into MSExcel. 
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Size: 1.19MB License: Freeware Price: Free By: IDELIX Software Inc. 
PTC Mathcad Express
3.1 

PTC Mathcad Express is freeforlife engineering math software 
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Size: 1106911K License: Freeware Price: Free By: PTC 
RapidPi
2.1 Build 1788 

RapidPi help you saving time when editing math in document. 
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Size: 3.01MB License: Shareware Price: $20.00 By: Trident Software Pty Ltd 
Equation Illustrator V
2.4.3.10 

A vast array of tools and methods helps you to format and align formulae. 
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Size: 2.62MB License: Shareware Price: $29.95 By: MGCSoft 
Math ActivityMaker: Fractions
1.61 

Create fraction worksheets, quizzes and activities in minutes! 
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Size: 2.69MB License: Shareware Price: $15.00 By: Gepeto Software 