SEOCrawler!

The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links, images, CSS, script and apps from an SEO perspective.

A web-based crawler with real-time crawl feedback.

ContentKing provides Real-time SEO Auditing and Content Change Tracking.

Netpeak Spider is your personal SEO crawler that helps you do a fast, comprehensive technical audit of the entire website. This tool allows you to:

DeepCrawl is the world's most comprehensive website crawler. Analyse your website architecture to understand and monitor technical issues to improve SEO performance.

This free SEO audit will let you know how you stack up against your competitors and how optimized your site really is. The audit researches your web page for more than 50 ranking factors. All it takes is about 15 seconds.

PerfectPage is an online platform geared towards small business owners and bloggers who manage their own websites but don’t have corporate budgets. With our collection of tools you can submit a webpage to be evaluated based on an extensive list of page elements, track your analytics, be alerted if your website ever goes down, compare your website to your competitors’ sites, and watch how your visitors interact with your site via heatmaps and scrollmaps. The best part is that our platform super user-friendly so you can get started right away! Finally – a website dashboard for the rest of us. »

SE Auditor is a program for analyzing web pages for search engines. It has multithreaded spider module for crawling subpages and batch audit mode for creating seo audit for many sites at once.

SEO Magnifier an online platform for the most usable SEO services for the webmasters. Paraphrasing tool, Word Counter, Article spinner, plagiarism checker are most popular services.

Presenting Visual SEO Studio, a desktop SEO Software with an innovative visual approach to Search Engine Optimization. Free version available. Complex SEO tasks made easy.