AARP.org
http://www.aarp.org

From their website:
"AARP is a nonprofit, nonpartisan membership organization for people age 50 and over.

AARP is dedicated to enhancing quality of life for all as we age. We lead positive social change and deliver value to members through information, advocacy and service.

AARP also provides a wide range of unique benefits, special products, and services for our members."

AARP - The Magazine
http://www.aarpmagazine.org/

From their website:
"AARP is a nonprofit, nonpartisan membership organization for people age 50 and over.

AARP is dedicated to enhancing quality of life for all as we age. We lead positive social change and deliver value to members through information, advocacy and service.

AARP also provides a wide range of unique benefits, special products, and services for our members."

Eons
http://www.eons.com

From their website:
"Boom. Boom. Boom. Have you heard it? It’s the beat of our generation of boomers—many of us at Eons included—who are lovin’ life on the flip side. Eons.com is the online community for “BOOMers,” those of us born between 1946 and 1964 and beyond, who want to learn and do more to make the most of every stage of life. Our community is the place for you to explore your passions and interests, keep in touch with friends and family, connect with interesting people to share life experiences, and most of all—have fun!

55Alive!
http://www.55-alive.com

From their website:
"Our mission is to build the premier online community for those age 55+. A community where you can find answers to diverse issues affecting your life, such as health matters and insurance, financial issues, and travel. If you have an idea about how to make the site better, please let us know. We're here to help make this your site.

55-Alive! is founded on the belief that everyone has unique insight and talents to contribute based upon experience and learning. Do you have a passion for a particular hobby or interest, such as photography? Would you like to help host a discussion board about travel? If so, let us know - we want your participation!"

ReZoom
http://www.rezoom.com/

From their website:
"Welcome to ReZoom.com! We're redefining life for an ageless generation. Think of us as your online gathering place. We're not focused on age - we're focused on living well, being well, traveling well, investing well and helping build A Better World.

If you're not quite ready for that AARP card - then ReZoom.com is your place online."

Elders Voice
http://www.eldersvoice.com/

From their website:
"Elders Voice is a social networking site for seniors citizens who are young at heart. We don't like labels. We know one thing for sure, our souls never age.

Elders Voice is a free service where you can meet and make friends with people of similar age and interests."

Growing Bolder
http://growingbolder.com

From their website:
"About Growing Bolder: We're the ones that brought video to the 50+ demographic. We're a team of good friends and Emmy Award-winning TV and radio people who like to tell the kinds of stories you won't find on the local news anymore. We've traded stabbings, drug deals, and traffic fatalities for stories that inspire, amuse, celebrate, and educate.

What is Growing Bolder? It's easier to show you than to tell you."