Suddenly Senior
The weekly e-zine for everyone over 50 who feels way too young to be old.   Many funny jokes and stories here.

Age-positive
Products, companies, etc. who portray the aged with respect, admiration, and in a positive light (as they should).

Living to 100
Originally part of a Harvard study of centenarians, the Living to 100 Life Expectancy Calculator© was designed to translate what we have learned from studies of centenarians and other longevity research into a practical and empowering tool for individuals to estimate their longevity potential.

Third Age
A site dedicated to issues faced by people 50+ (although the site really seems to be for those 60+).