Today webmasters are looking for different ways to monetize their content.In text advertising is one of them and it is becoming popular with time.There are few players in this ad type and below is the list of major In text Advertising networks
Infolinks is one of the major advertising network providing this type of ads.It also provides related tags, tag cloud and search widget.So it acts as a complete advertising network.The ad setup is also easy.They do not have specific traffic related criteria for signup so small webmaster can also use it.
Kontera is other major player of in text ads.It offers Social bar,site bar also apart from in text ads.You can try one of above two advertising networks.
Adbrite is not majorly a in text advertising network but offers inline text ads.So if you are using Adbrite ads then you can use inline texts from them.This reduces 5 to 6 additional calls if you are using different ad network for inline text ads.
Kontextual is relatively new player and it offers in image ads along with in text ones.the best part of this advertising network is no payment threshold.
You can use any of above advertising networks but if you looking for predominantly intext ads then use Infolinks or Kontera.You can also test above networks and see which one works best for you then you that network on your blog.You can freely download Udinra Adsense Alternatives plugin for wordpress if you are going to use any one of the above on your website.