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Originally Posted by EliteWebmaster
archive.org is the main one  |
Archive.org and Domaintools.com are two of the most popular.
As regards domain age. Having an older domain name is "not essential" to building good rank but it definitely does help. Google has been keying off that data for the longest time primarily because domain age is something which cannot be gamed and it tells Google something minor about the overall value of that particular domain name.
However, more important than that is how long your website has been ranking well in Google shows google how long you have been around in your industry. Your website might have been ranked very lowly for 10 years with no change of content, but you get some gain from the fact that you had a website ranked for so much longer than a new website especially if that website had been reviewed by google (google has data on all websites).