There are many In Image Advertising networks around.Each of them are different from other and provide different application along with advertisements.Below is the list of In Image Advertising networks which you can try on your website and make money
GumGum — It is one of the fastest growing advertising network currently.It approves small websites also.There is no criteria of large traffic so definitely a good choice.The application approval time is less so you can get started instantly.The main disadvantage is that it does not offer CPC ads (no click revenue).It offers only CPM ads.To know more read this.
Luminate — It was formerly known as Pixazza.It takes seven days time to approve your website.It has vast number of applications which increases interactivity to your images.The wide variety of applications combined with the low payment threshold makes it a worth trying network.
Image Space Media — One of the major advertising network in this niche.It also offers different ad formats.I have not tried this network yet so am unable to inform you about the details.But it certainly is good and well established network to try.
Taggify — A new advertising network in this area.But certainly showing a lot of promise.Along with image ads it provides video ads and suggestify.So you can use this advertising network to power your videos as well.
AdsinImages — It is very new advertising startup.The best part is they do not have any minimum payout.The advertising network is part of Kontextual.They also offer in text and related tag advertising also.To know more read this
You can use Udinra Adsense Alternatives plugin for WordPress (can be downloaded freely) to power your website with above advertising networks.