SEO Site Checkup - Find comprehensive search engine optimization (SEO) tools for your site.
SEO Analyzer By Neil Patel - A free SEO analyzer for your site
Mangools - Juicy SEO tools you will love: Keyword research, SERP analysis, rank tracking, backlink analysis, website SEO analysis.
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
Serpstat Website SEO Checker - Check your website's SEO, analyze competitors and keywords