Avangate is described as 'Affiliate marketing tips and opportunities for affiliates and managers.
Avangate accelerates cloud commerce for software and cloud companies to grow revenues via any channel, any model and any market' and is a Affiliate Marketing Tool in the Business & Commerce category. There are more than 25 alternatives to Avangate, not only websites but also apps for a variety of platforms, including Self-Hosted solutions, Wordpress, SaaS and iPhone. The best alternative is ShareASale. It's not free, so if you're looking for a free alternative, you could try Bytemart.org or Commission Junction. Other great sites and apps similar to Avangate are Post Affiliate Pro (Paid), ClickBank (Free), Blink Affiliate (Paid) and Affiliatly (Paid).
Post Affiliate Pro runs an entire affiliate program from top to bottom, with the exception of processing the financial transactions. However, most payment processors and shopping carts can be fully integrated with Post Affiliate Pro.
With the iTunes affiliate program you can link to media on the iTunes Store, the iOS App Store, the Mac App Store and the iBook Store and earn commissions from purchases made via those links, but creating affiliate links can be time-consuming and fiddly.