MITCalc - Bolted connection 

Geometrical design and strength check of a prestressed bolt connection, loaded by static or cyclic loading resp., acting both in the axis of the bolt and in the plane of the connected parts. Calculation support many 2D CAD systems
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Component Conversion Utility 

Minimizes the time needed to create skeleton code in a variety of languages. Can generate code from data culled from a friendly GUI, JDBC connection, compiled code or source code. Supports XML, Java, HTML/JavaScript, SQL, EJB, C and ASP/VB .Net.
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WinConverter 

WinConverter is a unit conversion program. The version 2.1 is pre-configured to convert 1400 units in 76 categories. If you find WinConverter is missing a unit you need, it's easy to add custom units or categories.
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FNA 

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.
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