CFD online
Online center for computational fluid dynamics. EXCELLENT!

CFDreview.com
CFDreview provides information, news and links to CFD related information.

Cogeneration links
Extensive link gallery of cogeneration related websites.

Combustion basics
From the Blesi - Evans company. Basics tutorial on combustion. Burner and boiler settings, efficiency maximization e.t.c.

Corrosion.com
EXCELLENT information site on corrosion and corrosion coatings. Technical articles, information, and links to coatings suppliers and experts.

Corrosiondoctors.com
Extensive corrosion information from Corrosiondoctors.com
In their resources you can find a dictionary of terms, technical data, problem solving methods, and much more.

Dirac Delta Consultants Ltd
The Science & Engineering Encyclopaedia is available on cdrom and covers more than 3600 topics with calculations, conversions and examples. The software runs on any machine with a cd drive and internet browsing software without any installation.

Dynamic head minor head losses.
Minor head loss in pipes tables for various fittings.

Elifritz information site.
Contains tons of science information, mainly physics. Very extensive tables on physical constants, formulae, theory.