SERPStream is a 100% free SEO tool. Members can keep track of their site's Search Engine Results Page position with updates as frequent as a dozen times a day. SERPStream have a great newsletter, sends email alerts, and have a state of the art keyword rank tracking dashboard.
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
Rakuten LinkShare - Building long-term, profitable partnerships between Advertisers & Publishers. Experience why Rakuten Affiliate Network (formerly LinkShare) was voted #1 Affiliate Marketing Network 3 years in a row.
SEO PowerSuite - Get all SEO tools in one pack - download free edition of SEO PowerSuite and get top 10 rankings for your site on Google and other search engines!
Commission Junction - CJ Affiliate by Conversant (formerly Commission Junction)
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
ClickBank - ClickBank is a secure online retail outlet for more than 50,000 digital products and 100,000 active affiliate marketers and are consistently ranked as one of the most highly-trafficked sites on the web.