Checkbot is a tool to verify links on a set of HTML pages. Checkbot can check a single document, or a set of documents on one or more servers. Checkbot creates a report which summarizes all links which caused some kind of warning or error.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.