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Fatigue Calculators for Stress life, Strain life and Crack life analysis for commonly used Aluminium and Steel alloys under cyclic loading conditions. | 
The Thermal Wizard™ is an interactive thermal workbook that provides calculators and datasheets for common thermal applications. |
eFunda is a premier on-line publisher for original engineering content and software. Offered are over 30,000 pages of engineering fundamentals and calculators. | 
XcalcS is a set of tools for engineering calculations in structural analysis. The tools are designed to be used directly on the web. Common plates, vessels and beams are supported |
Calculation of pressure drop in pipes for any given size, fluid density, pressure, flow rate, surface and temperature. Application available online. | 
FootRule.com is a continuously expanding collection of converters, units and measures, data tables. There is also a table of Fundamental Physical Constants… |
Free online calculator for o-ring grooves or suitable o-rings for a range of applications. |
Engineering Knowledge |
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SubsTech is a free and open knowledge source in Materials Engineering. SubsTech provides quick and simple access to the website content for anybody. | 
Eric Weisstein’s World of Science contains budding encyclopaedias of astronomy, scientific biography, chemistry, and physics. |
Resources, Tools and Basic Information for Engineering and Design of Technical Applications. | 
The purpose of FEMCI is to educate people in the art of finite element modelling and analysis. All articles have been developed by NASA employees or associates |
The COSMOS Companion is a series of presentations that provide information on a range of topics to help COSMOSWorks users design better products. | 
Free engineering tools, references and news for structural and stress engineers. Almost everything here is free to use and download. |
Keep up to date with the challenging and innovative techniques in Industry. This site is intended to provide information, software and tools for engineers working on high performance and high reliability design applications in mechanical engineering. |
Materials |
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MatWeb provides material properties for a large variety of materials. MatWeb is freely available and does not require registration. | 
JAHM Software provides easy access to over 2,500 materials and 21,000 sets of temperature dependent data for elastic modulus, thermal expansion, and more. |
Fluids |
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The NIST database contains transport and thermodynamic property data for the gases used in semiconductor processing. | 
This application enables data on many gas molecules to be accessed rapidly. Searches can be by a raw chemical formula, chemical name… |
Plastics |
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CAMPUS© WebView is part of Material Data Center. Access is free of charge as WebView is funded by the resin suppliers participating in CAMPUS. | 
This site is an independent forum for discussing constitutive models for polymers and their implementation in general purpose finite element programs. |
