The Wayback Machine, a part of the Internet Archive, is a collection of more than 400 billion web captures (as of 2014). The data is collected automatically by crawlers.
Nupedia, which was available in five different languages, was the precursor of Wikipedia. However, unlike the now popular online encyclopaedia, Nupedia wasn't "open" to everyone. Only selected people with expertise in their fields could write articles which were then reviewed by editors. [more...]