It would really depend on what type of site it is for as well as some other factors. If you are looking for an AdSense alternative the media.net is the Yahoo/Bing equivalent(sort of) although I haven't had much luck with them lately.
Thanks for reply. Website is about pdf templates(reciepts, certificates, legal and business documents ): pdftemplates.org may be i will give a try to media.net
oops I just asked the same question well I use media.net and adsbronco.com both are good need some more though to test!
You are most welcome. Let us know how well media.net works out for you. It seems to be hit and miss as it works well for some but not others.
If you are looking for Google adsense alternatives, then check out Revenue Hits, PopAds and Adversal.
Some good alternatives are adversal, propellerads, adcash. Media.net has mixed reviews (better you test yourself) .