LinkChecker checks HTML documents for broken links. It features:

o recursive checking
o multithreading
o output in colored or normal text, HTML, SQL, CSV or a sitemap
  graph in GML or XML.
o HTTP/1.1, HTTPS, FTP, mailto:, news:, nntp:, Gopher, Telnet and local
  file links support
o restriction of link checking with regular expression filters for URLs
o proxy support
o username/password authorization for HTTP and FTP
o robots.txt exclusion protocol support
o i18n support

This package contains a graphical user interface.