SiteAnalysis - Hosted service from Webmetrics, used to test and validate critical website components, such as internal and external links, domain names, DNS servers and SSL certificates. Runs as often as every hour, or as infrequent as once a week. Ideal for dynamic sites requiring frequent link checking.

HiSoftware Link Validation Utility - Link validation tool; available as part of the AccVerify Product Line.

ChangeAgent Link checking and repair tool from Expandable Language. Identifies orphan files and broken links when browsing files; employs a simple, familiar interface for managing files; previews files when fixing broken links and before orphan removal; updates links to moved and renamed files; fixes broken links with an easy, 3-click process; provides multiple-level undo/redo for all operations; replaces links but does not reformat or restructure HTML code. For Windows.

Link Checker Pro - Link check tool from KyoSoft; can also produce a graphical site map of entire web site. Handles HTTP, HTTPS, and FTP protocols; several report formats available. For Windows platforms.

Web Link Validator - Link checker from REL Software checks links for accuracy and availability, finds broken links or paths and links with syntactic errors. Export to text, HTML, CSV, RTF, Excel. Freeware 'REL Link Checker Lite' version available for small sites. For Windows.

Site Audit - Low-cost on-the-web link-checking service from Blossom Software.

Xenu's Link Sleuth - Freeware link checker by Tilman Hausherr; supports SSL websites; partial testing of ftp and gopher sites; detects and reports redirected URL; Site Map; for Windows.

Linkalarm - Low cost on-the-web link checker from Link Alarm Inc.; free trial period available. Automatically-scheduled reporting by e-mail.

Alert Linkrunner - Link check tool from Viable Software Alternatives; evaluation version available. For Windows.

InfoLink - Link checker program from BiggByte Software; can be automatically scheduled; includes FTP link checking; multiple page list and site list capabilities; customizable reports; changed-link checking; results can be exported to database. For Windows. Discontinued, but old versions still available as freeware.

LinkScan - Electronic Software Publishing Co.'s link checker/site mapping tool; capabilities include automated retesting of problem links, randomized order checking; can check for bad links due to specified problems such as server-not-found, unauthorized-access, doc-not-found, relocations, timeouts. Includes capabilities for central management of large multiple intranet/internet sites. Results stored in database, allowing for customizable queries and reports. Validates hyperlinks for all major protocols; HTML syntax error checking. For all UNIX flavors, Windows, Mac.

CyberSpyder Link Test - Shareware link checker by Aman Software; capabilities include specified URL exclusions, ID/Password entries, test resumption at interruption point, page size analysis, 'what's new' reporting. For Windows.