Easy Ads displays AdSense and its alternatives on your blog pages and sidebar widgets: Chitika, BidVertiser, Clicksor etc. Simple yet flexible.
AdButler WordPress Plugin - Simplify deployment of your ad zones with this highly efficient widget based ad deployment plugin
Injects any adverts (e.g. AdSense) into the WordPress posts or widget area. Restrict who sees ads by post length/age/referrer or IP.
Rotate adsense(or other ad) units in alternating positions in your single posts (pages optional)