Canada Institute for Scientific and Technical Information (CISTI)
catalogue
http://www.nrc.ca/cisti/ 
Login prompt with "cat". 

EEVL The Edinburgh Engineering Virutal Library
http://www.eevl.ac.uk/ 

FIREDOC
http://fris.nist.gov/#FIREDOC

inFIRE
http://www.wpi.edu/Academics/Library/InFire/ 

The Library of Congress 
http://www.loc.gov/ 

LRC Online Card Catalog 
http://www.lrc.fema.gov/ 

NFPA Library Card Catalog
http://www.sparky.org/LibNet/

PubMed
http://www.ncbi.nlm.nih.gov/PubMed/ 

Uncover
http://uncweb.carl.org/ 

Worcester Polytechnic Institute's Gordon Library
http://library.wpi.edu/