1)   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.
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 2)   Inspyder InSite 1.4.1
Check your website for spelling mistakes and broken links. Just enter your URL and go!
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 3)   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
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