Free VPN

TunnelBear 
Protocol: OpenVPN
Expiry/Bandwidth Limit: NONE
VPN Server Location: US, UK
Steps: Download, install, create account, activate account from email and connect.
Restrictions: 500MB bandwidth per month

TsunamiVPN
Protocol: OpenVPN
Expiry/Bandwidth Limit: 30 days after trial activation
VPN Server Location: US
Steps: Register, verify account from email, download and install software, connect to VPN.
Restrictions: 200MB bandwidth daily, hourly disconnection

Mullvad
Protocol: OpenVPN
Expiry/Bandwidth Limit: 3 hours after installation
VPN Server Location: Netherlands, Sweden
Steps: Download software, install and connect.
Restrictions: NONE

Kebrum
Protocol: OpenVPN
Expiry/Bandwidth Limit: NONE
VPN Server Location: Germany
Steps: Fill up form to register an account. Once logged in, you can either download their VPN software, access PPTP settings page or download the OpenVPN config files.
Restrictions: Only port 80 and 443 is allowed.

VPN Tool
Protocol: L2TP
Expiry/Bandwidth Limit: NONE
VPN Server Location: France
Steps: Fill up form, download software, install and enter login information to connect.
Restrictions: Download and upload speed limited to 96Kbps

PRIVATE WiFi
Protocol: OpenVPN
Expiry/Bandwidth Limit: 3 days after account creation
VPN Server Location: US, UK, Netherlands, Singapore
Steps: Enter email, download software and install
Restrictions: NONE

Spotflux
Protocol: OpenVPN
Expiry/Bandwidth Limit: NONE
VPN Server Location: US
Steps: Download, install and connect
Restrictions: Software runs on Java

USAIP
Protocol: PPTP, L2TP, SSTP
Expiry/Bandwidth Limit: NONE
VPN Server Location: US, UK, Netherlands, China, Germany, Hungary, Pakistan, Sweden, Ukraine
Steps: Download software, login using demo account and select server to connect
Restrictions: Auto disconnect every 7 minutes and speed capped at 200Kbps

TorVPN
Protocol: OpenVPN
Expiry/Bandwidth Limit: 1GB per month with NO EXPIRY
VPN Server Location: Hungary
Steps: Create account, activate via email, install OpenVPN and copy files to OpenVPN config folder.
Restrictions: Account auto deactivated if idle for 7 days

proXPN
Protocol: OpenVPN
Expiry/Bandwidth Limit: NONE
VPN Server Location: US
Steps: Download, install software, create account and activate account from email.
Restrictions: Speed limited to 300Kbps and initially forwards you to upgrade your plan to premium then wait 10 seconds to get to your site.

CyberGhost
Protocol: OpenVPN
Expiry/Bandwidth Limit: 1GB per month with NO EXPIRY
VPN Server Location: Germany
Steps: Download, install and create account. Optionally get a 1 month free premium trial by providing email.
Restrictions: Involve a lot of steps in setting up which can be a bit confusing. Auto 6 hours disconnection and download speed limited to 2Mbps.

Hotspot Shield Free
Protocol: L2TP
Expiry/Bandwidth Limit: NONE
VPN Server Location: US
Steps: Download and install.
Restrictions: Display advertisements on top of web browser

SecurityKISS
Protocol: OpenVPN, PPTP, L2TP
Expiry/Bandwidth Limit: 300MB usage per day with NO EXPIRY
VPN Server Location: US, UK, France, Germany
Steps: Download and install. To use PPTP or L2TP, provide email to receive the individually generated configuration.
Restrictions: Capped speed, no games, email clients, voip or video chats, and video/music streams.

etteGo
Protocol: L2TP
Expiry/Bandwidth Limit: After 512MB bandwidth usage
VPN Server Location: US, Netherlands, Canada, Ukraine, Latvia
Steps: Enter email address, activation account from email, download software or manually setup L2TP connection.
Restrictions: None

 Source : mmobt