Amazon Associates, CJ (formerly Commission Junction) and Rakuten Affiliate Network (formerly Linkshare) are among the best-reviewed affiliate programs, according to Revenue Performance and ProBlogger. These programs are free to join, but generally the affiliate program applicant has to submit a website for approval.
Rakuten Affiliate Network offers a useful combination of pay-per-sale and cost-per-action compensation for its affiliates. Compared to Rakuten, Amazon Associates is only a pay-per-sale program, but members of Amazon Associates can promote the widest range of products and benefit from the well-known Amazon brand. CJ is considered to be a technological leader in affiliate marketing industry, and it is very popular among professional online retailers. Other reliable affiliate programs include Avangate, Ebay Partner Network or Clickbank.