I'm pretty sure nothing pays what it's worth annoying your visitors besides AdSense. AdBrite sucks, infolinks sucks, kontera sucks, adfly sucks, bidvertiser sucks, clicksor, smowtion sucks. I don't think any of them are even worth putting on your site really.

Nope adsense is king in my eyes... nothing really compares

I tried about four or five alternative ad programs, and all of them sucked.