If you run any sort of web site or blog, it is a good idea to periodically check to see if all of your links are current and still working. If you have links, that lead no where, also known as broken links, it lowers the credibility of your site.
Of course, manually checking every link to see if it still works is out of the question, so a good free program that will check your links for you is http://home.snafu.de/tilman/xenulink.html.
Xenu will check all of your website’s links to see if they still connect to active pages. I was able to correct a typo on my own blog by using this software. It did also come up with one false positive, but that was fairly easy to check up on. The program takes up very little hard drive space and is pretty easy to install. So for a nice little piece of software that can help keep your website running properly, check out Xenu.