Affiliatly is described as 'affiliate tracking software and an easy way to start your own affiliate program'. There are more than 10 alternatives to Affiliatly, not only websites but also apps for a variety of platforms, including Self-Hosted solutions, Wordpress, SaaS and Mac. The best alternative is Avangate. 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 Affiliatly are ShareASale (Paid), Post Affiliate Pro (Paid), Blink (Paid) and ClickBank (Free).
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.
AffiliateWP is a robust and feature-packed affiliate tracking software for WordPress. Reliable Affiliate Tracking AffiliateWP tracks affiliate referrals reliably, even on servers with aggressive caching.