Netpeak Spider - A desktop tool for fast and comprehensive technical audit of the entire website.
SEO Analyzer By Neil Patel - A free SEO analyzer for your site
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.
Serpstat Website SEO Checker - Check your website's SEO, analyze competitors and keywords
SEO Crawler - A web-based crawler with real-time crawl feedback.
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.