The referral community
Invitation App is a social network where people post their referral codes and collect rewards on autopilot.
Community based online classifieds
Oddswop lets you create your own classifieds site for any special interest group or community. For Free! We're taking applications now: http://communities.oddswop.com/ Some say that Oddswop is StackExchange + Craigslist. We connect like minded people to their ...
Marketplace for buying and selling websites
Ackwired.com is an online marketplace for buying and selling web startups and premium established websites. We are an aggregator and self-listing platform allowing you to list your website and accept offers from prospective buyers.