http://www.newhomeguide.com/Active-Adult-Homes/

http://www.usactiveadultcommunities.com/

http://www.activeadultliving.com/

http://delwebb.com/

http://www.americanhomeguides.com/homes/active_adult.html

http://www.55communityguide.com/Guide/55_Communities/Active_Adult_Communities

http://www.activeadulthousing.com/

http://www.activeadultliving.com/MD/maryland.htm

http://www.florida-active-adult-communities.com/index.html

http://www.prudentialct.com/specialproperties_aa.asp