Some useful free SEO tools you can use to help with a number of SEO-related tasks.
- a fast, advanced website crawler that helps to identify SEO issues with a website - crawl up to 300 pages for free
HTTP Status Checker
- bulk check a list of URLs, all links on a page, or all URLs in an XML sitemap for 404s, redirect chains, etc
XML Sitemap Extractor
- Extract a list of URLs from an XML Sitemap
Enterprise SEO Tools
SECrawl - Enterprise SEO Crawler