ReferralMagic - Turn your users and customers into referral magnets.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
AffiliateWP - A powerful affiliate marketing solution for WordPress.
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!
Echo - Golang HTTP server framework
SEO Tools Centre - SEO Tools Centre provides SEO checker services for websites.