Adsense is the most biggest section for PPC . For Alternative way you should do Ad choice , Adbride or Bidvertiser etc . But Adsense is the best.
equal money, no. You can mix together infolinks and chitika for instance. But I doubt you'll make half of what can be made with adsense. But they are other things in online life than PPC ad networks. As for xtremeseller answer, well first ad choice doesn't exist as an ad network, it is a consortium of ad networks (a bullshit thing). And adbride doesn't exist either, maybe you meant adbrite but that is dead/closed.
Try bidvertiser..it's a very good alternative. You'll get paid probably not as much, but it's close enough, and the payout is only 10 bucks which is awesome.