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Reddit takes a leaf out of Facebook's book, by almost poking fun at it. With its new Reddit Timeline feature, you can browse "news" stories from as far back as 1066 for the Battle of Hastings, or even the 1776 U.S. Declaration of Independence. You can even head back to see what the dinosaurs were talking about. Having said that, if you are feeling adventurous, you can always go forward in the future and see what your future self is submitting -- though, it's probably the same old memes we see today (because they are.)
Skype goes back to version 1.0 with its regressive communications technology: two cups and string. Dubbed as an "experimental version of Skype" that doesn't even require an Internet connection, you can use Skype for String using nothing but standard household items. It's also free, so why not give it a go?