Good programs for a 'Free' products website

Hey guys. I run a classifieds website where users giveaway free items. I currently have Adsense as a revenue source, and I am now looking into integrating Affiliate banners. What would be good programs to secure the interest of my visitors? So far I've been looking into: Free Dating websites and Employment websites. Haven't been able to find programs on CJ that have free samples. Any ideas will be appreciated. Thanks!

You can try Click Bank