What is VPN?
VPN stands for virtual private network. A VPN keeps your wireless communications safe by creating a secure "tunnel," though which your encrypted data travels. These tunnels cannot be entered by data that is not properly encrypted. Not only is data encrypted when you use a VPN, but the originating and receiving network addresses are also encrypted. This adds an extra layer of security. 

What is proxy? 
Proxy sites enable you to bypass your own Internet provider and browse through the proxy web site. All that you have to do is type the web site address you would like to visit in the form they provide, and start browsing. Once you keep browsing using that form, you are protected and your real IP address is not being logged.

A virtual private network (VPN) is a network which is developed  to provide access to remote offices or individual users by using  secure mode connection within an organization’s network. VPN is basically used by the companies who have diffrent setups of their offices in different geographical regions.Which leads to get optimal result with less cost.To gain access to different portals of organization VPN tunnel is created,from which all the data will transmitted and receive using Encryption methods,meanwhile we can also grant access to blocked site within organization like Facebook,Youtube & Twitter.

By taking this as advantage we can use VPN to unlock lots of blocked services even they are HTTPS,like proxy it allow us to surf  secretly.The basic differences between VPN and proxy is ,VPN is secure & an encrypted  connection where as proxy is intermediate server who act behalf of other.

WHY YOU NEED VPN:-

• To protect privacy, either on a LAN or a public hotspot.
• Anonymous Internet Surfing.
• Full anonymity by hiding your real IP address.
• Bypass geographical blocks from certain websites.
• Unlike a proxy, you get secured connection for all programs you are using.
• Quality Network ensures your VPN service will be fast wherever you are in the world.
• Protection against your ISP.
• Bypass ISP Blocking for VOIP Applications like Skype.

First of all, lets talk about what is VPN . Virtual Private Network. Basically it’s a private network which lets users to connect to other users or remote sites using a public network

usually internet. It uses "virtual” connections routed through the Internet from the company’s private network to the remote site or employee instead of physical connections. In short , it is private network constructed within a public network infrastructure, such as the global Internet.

Why You Need  VPN

• To protect privacy, either on a LAN or a public hotspot.
• Anonymous Internet Surfing
• Full anonymity by hiding your real IP address.
• Bypass geographical blocks from certain websites
• Unlike a proxy, you get secured connection for all programs you are using
• Quality Network ensures your VPN service will be fast wherever you are in the world
• Protection against your ISP
• Bypass ISP Blocking for VOIP Applications like Skype

Top 10 Free VPN  Servies 

1. UltraVPN

It is a free VPN client/server SSL VPN solution based on OpenVPN. It encrypts and anonymizes your network connection making your connection safe and secure.

You need to download and install the client and create a (username, password) to use this service.

2. Logmein Hamachi

It’s a great free VPN service from the well known guys who are behind the Logmein Service of remote apps management. It’s free for non-commercial and personal use.

 Features  :

• No hardware required – A quick, simple and easy-to-use VPN that just works
• Secure communications – Encrypted tunneling across public and private networks
• Flexible networking – Combines the ease of an SSL VPN with the connectivity of an IP-sec VPN
• Web-based management – Deploy to anyone, manage from anywhere, access anytime
• Free for non-commercial usage – Absolutely free for non-commercial use

3. Packetix

Its a japanese free VPN solution with technology developed by SoftEther Corporation.You can use PacketiX.NET online test service for free.Here’s what you can do with this service.

You can create your private Virtual VPN Hub. You can configure and use the hub for free.You can use all functions the PacketiX VPN software has to offer, such as creating a remote connection to your home network or uniting local networks at different sites. With our system, you won’t need to set up a VPN server with a global IP address yourself. The VPN server administration is done over an easy web interface.

4. Open VPN

Open VPN drives UltraVPN, OpenVPN is a SSL/TLS based VPN, it provides high security and privacy. The biggest difference between PPTP VPN and OpenVPN is you need install OpenVPN client software to use OpenVPN service, and OpenVPN DO NOT work on mobile devices such as Iphone, Ipad Windows Mobile and Android. But OpenVPN works on Windows, Mac and Linux.

5. Your Freedom

This one is basically not a VPN service but its performs almost the same function with great ease, hence i included this in this list.

It provides both a free and paid service. Free service limits to six hours of usage per day (up to 18 hours per week). You need to install a client on your system and a user name & password to use this.

6. Macro VPN

Just like other services MacroVPN offer free VPN service for the user's, it provides 128bit PPTP encrypted VPN Connection Service, protection on wifi hotspot. Normally assigned US based IP's.

7. Hotspot Shield 

Hotspot Shield is a free VPN service which protects your entire web surfing session; securing your connection at both your home Internet network & Public Internet networks (both wired and wireless)

.

Hotspot Shield protects your identity by ensuring that all web transactions (shopping, filling out forms, downloads) are secured through HTTPS.Here also, you need to download and install a client to use it on your computer.

8. Its Hidden

Itshidden is part of Port 80 Limited(Seychelles) company providing both free VPN and paid services of VPN

It creates a secure connection encrypting all the data protecting your privacy and securing you. You dont need to install any software. ItsHidden.com works on all Platforms including Windows, Mac, Linux, IPhone etc

9. CyberGhost  

This a free VPN service from Germany which helps you route you through a German IP. The free service is limited to 10GB traffic every month, which is more than enough for surfing on websites, chatting and email.

10. Gpass

This is another free VPN service product of the World’s Gate, Inc which offers Internet solutions for information freedom in China and other regions.

You need to install a software client to use this.