How can I make a site like this?

[Clones]

Clones, thanks a lot, I already have my wordpress blog on the domain and hosting, but I just can't seem to find any plugin that would allow me to create like, three buttons saying ''Post Image, Post Text, Post Video'' and make it so that registering is unnecessary.

That won't happen, mean wp is made to allow registered members only to post. I suggest you hire a freelancer and he can make you a custom script just as you want