Free windows spidering software that checks web sites for broken links.

Sample robot application With portable source code, using the LibWWW library, which can be used to create a link checker application.

A console application written for GNU/Linux systems in C++. [GNU GPL]

Check HTML documents recursively for broken links. Supported link types are http, https, ftp, mailto, news, nntp, gopher, telnet and file.

From one URL, it can fetch one page or spider the site, and create a report.

Perl program checks all links on a web site, either by a local site scan or remote site scan. [GNU GPL]

Link checking and website management tool for Unix, Linux and Windows. It also validates html and produces sitemaps.

Advanced Web link checker. Features dead link verification, Shockwave/Flash file format checking and scheduling of Web and e-mail reports. Free trial and commercial service can be configured to check as many sites as desired.

Windows URL-verification software with nice site mapping and outlining features. Shareware.

Automatic, scheduled link checking with email notification. Nothing to install - just use a browser. Commercial service with a free trial.