Companies
Cooper
(Formerly Cooper Interaction Design)
http://www.cooper.com/
forUse
Constantine & Lockwood, Ltd.
http://www.foruse.com/
IBM Ease of Use
http://www.ibm.com/ibm/easy/
InContext Enterprises
http://www.incontextdesign.com/
Information & Design
http://www.infodesign.com.au/
Microsoft Usability
http://www.microsoft.com/Usability/
MSDN Library > User Interface Design and Development
http://msdn.microsoft.com/ui/
Nielsen Norman Group (NN/g)
http://www.nngroup.com/
SAP Design Guild
http://www.sapdesignguild.org/
Serco Usability Services
formerly National Physical Laboratory Usability Services
http://www.usability.serco.com/
The Hiser Group
http://www.hiser.com.au/
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