Wayback Machine - Browse through over 150 billion web pages archived from 1996 to a few months ago.
Perma.cc - Perma.
Archive.md - archive.is allows you to create a copy of a webpage that will always be up even if the original link is down
WebCite - May 5, 2017 - What makes a website's homepage design brilliant instead of blah? . Download our full collection of website homepage examples here to inspire your own homepage design.
Archive-It - Archive-It is a free to use web archiving service designed for the libraries and archives.
FreezePage - FreezePage is a free service for taking online snapshots of web pages.