i had a same question yesterday,u can check the reference suggestions from the other thread too ,i'm also considering what to use
they said VPN are to risk that others copy your infos from your ip , i don't know, and i don't have VPN neither a company aboard... i confused, and proxy not for free ...
You can get proxies for free, just have to find the right website.
I'm using ProXPN, it's free and it's really fast, and no ads, which is a plus.
You can also download Hot Spot Shield, but there are way too many ads.
They both let you go onto all the sites that are blocked (Facebook, Youtube, Tumblr, Twitter, etc.)
all for free.