ProtonVPN - ProtonVPN is a security focused FREE VPN service, developed by CERN and MIT scientists. Use the web anonymously, unblock websites & encrypt your connection.
OpenVPN - OpenVPN - The Open Source VPN
Shadowsocks - A fast tunnel proxy that helps you bypass firewalls
TunnelBear - Really simple VPN to browse the web privately & anonymously.
Psiphon - Psiphon is circumvention software for Windows and Mobile platforms that provides uncensored access to Internet content. Read more about Psiphon.
XX-Net - XX-Net is GoAgent with improvements.