PopellerAds network is an alternative to Google Adsense. Some time ago Adsense used to work with almost all websites, but now the policy has changed. Now one of the best alternatives to Google Adsense is PropellerAds system. We use it on our web projects where Adsense is not allowed due to their policies, but you we still want to put some ads on it and earn from visitiors clicking on the ads.
Visit PropellerAds and check if it is for you.