Look for archived copies of broken links with Wayback Machine for Chrome
Hit a 404 dead end and hope to see an archived version of an old site? A new Chrome extension makes it easier for you. Aptly named the Wayback Machine for Chrome, this extension checks to see if an archived version of a site is available once you hit that familiar error code. The great thing is you don’t have to head to the Wayback Machine site to do just that. Now, you have a Chrome tool to do that for you.
Source: Lifehacker