Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
Netpeak Spider - A desktop tool for fast and comprehensive technical audit of the entire website.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Screaming Frog SEO Spider - The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links...
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
FandangoSEO - Monitor your SEO 24/7 with our SEO Crawler and Log Analyzer