1)   Inspyder InSite 1.4.1 Check your website for spelling mistakes and broken links. Just enter your URL and go! 2)   URLSpellcheck 2.0 Port80's URLSpellCheck for IIS improves user experience and reduces abandonment due to annoying 404 errors by automatically correcting common typing errors in URLs. Fix missing, transposed, and extra characters, and even incorrect file extensions. 3)   CustomError 3.0.2 CustomError for IIS allows developers and admins to easily create customized 404 and other default error pages, therefore improving user experience and reducing customer abandonment rates. It can now also redirect any 404 error for SEO optimization! 4)   SiteScan XP - Web Spider & Link Checker 1.1 All-in-one Website Scanner, Link Checker, Response Timer, Browser & Editor. Scan entire websites for broken links, server errors and measure page response times. Analyze individual pages - highlight links in the browser or source code, edit and save. 5)   Total Validator Tool 1.3.1 Performs four important validations on your web pages: True (X)HTML validation against published DTDs; accessibility validation against the W3C and US Section 508 guidelines; spell checking against one of five languages; and checking for broken links