I live in Iran, where many websites are blocked from access by a professional local firewall.
I'm looking for a free VPN, HTTPS, or any possible proxy software/solution for Ubuntu that could let me to bypass the censorship, so that I could at least access Facebook and Twitter.
I'm saying free because I'm a full time college student and I really can't afford buying a VPN service alongside of other costs to just be able to access Facebook and Twitter.
I do use Hotspot Shield for Windows, which is very fast and does the job. But for Ubuntu OS, I couldn't manage to find a good solution.
I have tried Tor also, but Tor is very, very slow. I can't even open a webpage without waiting for more than 5-10 minutes.

If you know any good and fast solution for bypassing censorship on Ubuntu, please let me know. I can't wait to browse all kinds of pages that I want in Ubuntu.
Thank you.