To save web pages forever

Internet Archive doesn't offer an option to download saved pages but Archive.Is can be a good alternative. It is very similar to archive.org in the sense that you enter the page URL and it will make an exact snapshot of the web page on their server. The page will be stored online forever but here you also have the option to download the saved page as a ZIP file. It too provides date based archives so you can have multiple snapshots of the same page for different days.

http://www.labnol.org/internet/archive-web-pages/20192/