Ahrefs Backlink Checker - With the world's biggest index of live backlinks (over 15 trillion), Ahrefs Backlink Checker will show you the most complete backlink profile for any website.
Netpeak Spider - A desktop tool for fast and comprehensive technical audit of the entire website.
Backlink Tool - A backlink tool to index your links quickly and freely.
Screaming Frog SEO Spider - The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links...
SEMScoop - Find and analyze easy to rank long-tail keywords with free SEMScoop Keyword Difficulty Tool, Start using them for SEO, PPC, content creation and all your marketing activities
Pulno - SEO Audit and Website Analysis. Pull up your SEO.