I'm using Adsense for a month now. Are there any other PPC systems that i can use along with Adsense. I know contextual ads are not allowed. What about text ads line infolinks? can i use it along with adsense. Can i use Bidvertiser/AdBrite etc. along with adsense.
If you're not making money with Adsense, adding additional PPC programs to your site isn't going to help you earn more. You need to figure out what about your site is causing you not to earn with what you have now.
All other networks are way behind adsense. Focus and work hard on adsense and you can make good money from it.
Adsense really is the easiest system to start making money with, but if you aren't happy with them there are alternatives. I personally know a few people that have had decent success with Chitika, I myself have not however, but it is an interesting ad network and definitely worth a look. As mentioned, adbrite is a good alternative that lets you charge fixed advertising rates as well as PPC. Then you have banner and text link advertising that won't interfere with adsense and allow you earn steady reliable income. Take a look at the Adsense TOS for dos and don'ts if you're not sure.