TurboHide - TurboHide keeps you anonymous from sites that you visit and allows you to bypass any firewall restrictions from your school, college, workplace or home.
OpenVPN - OpenVPN - The Open Source VPN
CroxyProxy - CroxyProxy is the most advanced free and secure web proxy.
Hotspot Shield - Hotspot Shield is a software application developed by AnchorFree, Inc.
Tor Browser - Tor is free software for enabling anonymous communication.
TunnelBear - Really simple VPN to browse the web privately & anonymously.