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!
Monitor Backlinks - Easy Link Management - SEO Tool for automatically checking your backlinks.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
SEO SpyGlass - SEO Spyglass is a website backlink checker tool & link popularity checker.
SEO Tools Centre - SEO Tools Centre provides SEO checker services for websites.
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.