Affymetrix http://www.affymetrix.com/index.affx
Agilent http://www.home.agilent.com/agilent/home.jspx?cc=US&lc=eng
Ambion http://www.ambion.com/catalog/index.html
Corning http://www.corning.com/lifesciences/US-Canada/en/
Ingenuity Systems http://www.ingenuity.com/
Invitrogen http://www.invitrogen.com/content.cfm?pageid=1&ix=1
Molecular Devices http://www.moleculardevices.com/
MWG Biotech http://www.mwg-biotech.com/
NHGRI Microarray Project http://research.nhgri.nih.gov/microarray/main.html
TeleChem International, Inc http://www.arrayit.com/
The Brown Lab http://brownlab.stanford.edu/
TIGR http://www.tigr.org/