sitecheck
Modular web site spider for web developers.
More than just a link checker, sitecheck is a website spider (also known as a crawler) which can assist with SEO by testing an entire site plus both inbound links from search engines and outbound links to other sites for the following issues: looping redirects (HTTP 301/302), broken links (HTTP 404), server errors (HTTP 500), spelling mistakes, low readability scores (using the Flesch Reading Ease test), missing/empty/duplicate meta tags, duplicate content, slow page speed, W3C validation errors and accessibility errors.
Sitecheck can also spot some common causes of PCI compliance failure such as insecure content on secure pages, SQL injection/cross-site scripting (XSS) vulnerabilities, insecure encryption ciphers and open mail relays. ...