WebCite is described as '®, which used to be a member of member of the International Internet Preservation Consortium, 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' and is an website in the Backup & Sync category. There are six alternatives to WebCite, not only websites but also apps for a variety of platforms, including Android, iPhone, Android Tablet and iPad. The best alternative is Wayback Machine, which is free. Other great sites and apps similar to WebCite are Internet Archive (Free), Archive.is (Free), Archive.st (Free) and Time Travel (Free).
The Internet Archive is building a digital library of Internet sites and other cultural artifacts in digital form. Like a paper library, it provides free access to researchers, historians, scholars, the print disabled, and the general public.
Free online service for freezing web pages. Save, share and prove what is on the web at a specific point of time. You have to register a free account and to log in every month otherwise your frozen pages won't last more than 3 days.