OSI Affiliate is an affiliate marketing software product that can be used to create affiliate programs.
The Alexa traffic rank for OSIAffiliate.com is about 70,000, so I would say this is a pretty popular option.
As a comparison though, Post Affiliate Pro which is a competitor of theirs has an Alexa ranking of less than 10,000 which is way better.
OSI Affiliate shows a list of some of their most famous brands using their product on their website, which lacks any top businesses I’ve heard of.
The screenshots of their product look great though and it starts at just $47/mo which is about half the price of Post Affiliate Pro.
The 20% revenue share you can earn with this affiliate program is recurring for the lifetime of your referrals.