SpiderView is a program which can spider a webpage, testing the links found on the page, evaluating your server and its performance.

• $49.95

WebTester is a handy site management tool, the primary purpose of which is to check your site for broken links. It will report both on missing files and on those which exist but aren't referenced. It can also check the validity of your external links. The script is fairly robust; in addition to following "straight" links, it will also parse and follow links in image maps, in text embedded via SSIs, and (optionally) in CGI-generated pages. It will let you know the effective "download" file size of your pages, and will provide estimates of how long they'll take to download at various connection speeds. Finally, it can create for you a simple "site map" showing, in outline format, all of your site's pages.

• Free

A link validator for XHTML web pages that will crawl an entire site. Controllable on page-by-page or link-by-link basis.

• Free

Checks all external and internal links to a page and outputs their quantity and status.

• Free

Elsop developed LinkScan using a file system navigation approach to provide users with software capable of verifying many links in a short period of time.

• $49.95
• $495

This script will test a list of links and tell you which ones are bad links. It specifies which ones redirect to other pages, which are forbidden access links, which are successful, and which are 'File Not Found' pages.

• $100

This script logs and manages 404 error page requests.

• Free
• $20