View a cached page
A cached page is a snapshot or a version of a web page saved at a specific time and stored by a web server as a backup copy.
Checking a cached version of a page instead of the current live version is useful if the original page is unreachable due to an Internet congestion or if the website is down, overloaded or slow, or simply if the web page has been removed by the site owner.
About the providers:
Google Cached Page
Google Cache is normally referred as the copies of the web pages cached by Google. Google crawls the web and takes snapshots of each page as a backup just in case the current page is not available. These pages then become part of Google's cache. These Google cached pages can be extremely useful if a site is temporary down, you can always access these page by visiting Google’s cached version.
Google web is usually updated in a few days. The actual time of the updates depends on the frequency the website updates itself.
The Archive.org, also known as Wayback Machine, is a digital archive of the World Wide Web and other information on the Internet created by the Internet Archive, a non-profit organization, based in San Francisco, California. It was set up by Brewster Kahle and Bruce Gilliat, and is maintained with content from Alexa Internet. The service enables users to see archived versions of web pages across time, which the Archive calls a three dimensional index.
Coral Cache, also known as Coral Content Distribution Network or Coral, is a free peer-to-peer type web cache based on the peer-to-peer content distribution network designed and operated by Michael Freedman. Coral uses the bandwidth of a world-wide network of web proxies and nameservers to mirror web content, often to avoid the Slashdot Effect or to reduce the load on websites servers in general.
Coral Cache is ususally not updated as frequently as Google web cache.
WebCite is an on-demand archiving system for webreferences (cited webpages and websites, or other kinds of Internet-accessible digital objects), which can be used by authors, editors, and publishers of scholarly papers and books, to ensure that cited webmaterial will remain available to readers in the future.