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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?
Even if you're not a power-user of the Web, the chances are you are using some form of advert-blocking tool. For Chrome and Firefox users, you're probably using AdBlock. Not on April 1, you're not. For one day only, it has transformed into CatBlock, where adverts, which would normally be displayed are replaced with cats. Don't worry, your favourite sites haven't been hacked or had cat images injected into them. It's just your ad-blocker having a laugh at your expense.