3 more alternative of Adsense

I think second largest ad network in the world after Adsense is Chitika, they will not pay you like Google Adsense or PPC, they will pay you for Ad space sold, mean to say that you have no need to search best advertiser, they will give to advertiser, advertiser will buy space on your website, about payment they will pay you 75% of payment and 25% they will keep.

Bing Network Contextual Ads program enables web publishers to easily and earn advertising revenue. Media.net is providing its user the best rates for ads as well as the best ads. You can receive payment via through Paypal if you cross 100$

 Another alternate of Google Adsense is Exit junction, if you have good amount of traffic on your website then you can earn more effectively by this program, it work different ways, it will show relevant Ad as a pop up window to a visitors, so you can get easily account here, Exit Junction has a fairly good CTR, You can receive payment if you have minimum amount $50.