Remark:
"Deep" links to specific web pages may become obsolete as the sites are being updated. 
Please report bad links to Tino Hochepied

Find a mutant mouse

• International mouse strain resource (IMSR) 
  (http://www.informatics.jax.org/imsr/index.jsp)
• Gene knockout database (Frontiers in Bioscience)
  (http://www.bioscience.org/knockout/knochome.htm)
• Mouse genetics resources (National Institute of Genetics, Japan)
  (http://www.shigen.nig.ac.jp/mouse/strain/strainlist_e.php)
• The Sloan-Kettering Institute Mouse Project
  (http://mouse.ski.mskcc.org)

Find mutated ES cells

• International gene trap consortium (IGTC)
  (http://www.genetrap.org)
• Lexicon Genetics
  (http://www.lexicon-genetics.com/discovery/omnibank.htm)
• European conditional mouse mutagenesis program 
  (http://www.eucomm.org)
• Resource on mouse mutagenesis, phenotypes and complex traits
  (http://www.informatics.jax.org/mgihome/other/phenoallele_commun_resource.shtml#pointer1)

Find a Cre or Tet mouse

• Cre transgenic database 
  (http://www.mshri.on.ca/nagy/Cre-pub.html)
• Tet mouse database (tTa, rtTa, tetO)
  (http://www.zmg.uni-mainz.de/tetmouse/index.htm)

Companies that generate targeting vectors

• Gene Bridges(http://www.recombineering.net/web/company)
• Bluesky Biotech(http://www.blueskybiotech.com/index.cfm?e=molecular_biology)
• Hypromatix(http://www.hypromatrix.com/Service)
• Vega Biolab(http://www.vegabiolab.com)

Companies that generate mutant mice 

• GenOway (http://www.genoway.com)
• inGenious(http://www.genetargeting.com)
• Nucleis(http://www.nucleis.com)
• OZgene(http://www.ozgene.com/html/index.php?lang=en)
• Polygene<(http://www.polygene.ch)