Institute for 21st Century Relationships
Founded in July 2000, the Institute for 21st Century Relationships helps "people create lasting intimate relationships that will work in our present world".

Loving More
Managed by Ryam Nearing, this site features information, chat rooms, links, FAQs, and messages boards - all about polyamory.

Naughty Nightlife
"The quintessential guide to escorts, strip clubs, and swingers."

Polyamory.org
A great starting point for those interested in polyamory.

Polychromatic Professionals
Online resources with listings to poly-friendly professionals.

SwingersClubList
Worldwide swingers' resource.