The Rare Disease Search Engine is specialized search engine using Google's co-op program combined with a narrowed field of search to eliminate useless results that would normally complicate one's search for needed information. The sites incorporated into the search include:

endo-society.org, rarediseases.org, rarediseases.about.com, ord.aspensys.com, rarediseases.info.nih.gov, rarediseasesnetwork.epi.usf.edu, webmd.com, fda.gov, mayoclinic.com, 4woman.gov, phppo.cdc.gov, genome.gov, nih.gov , caresfoundation.org, crdnetwork.org, russell-silversupport.org and congenitaladrenalhyperplasia.org