Internet Archive has been working repair broken links as part of its Building a Better Web project. Previously broken links have now been linked to archived pages in the Wayback Machine.
Internet Archive has also been running software that locates broken links on 22 Wikipedia language editions.
When broken links are discovered, the IABot software searches for archives in the Wayback Machine and other web archives to replace them with. So far, six million external references have been fixed.
Internet Archive plans to increase the speed of its scanning and fixing project. It will explore ways to expand its link checking and fixing to additional content formats, including digital books and academic papers.
Source: Internet Archive blog, via Library Journal.