Just link to the links page from somewhere visible on your site, and get targeted traffic from the exchanges. AddPro Automatic submission to major search engines. Doesn't force a link back. Also has a small web promotion guide. Click-thru Get a visitor in return for each site you visit through the system.
Traffic is somewhat targeted.
People are encouraged to explore sites through bonus icons. Hit Harvester Get a visitor in return for each site you visit through the system. Supplies traffic much more quickly than click-thru, but it's low quality random traffic. Again Shortcut Place a graphic icon on visitor's Windows desktop so that they can easily remember to return to your site. Interesting idea for increasing repeat traffic.