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Virtual Private Network:

VPN's are most trusted way of hiding online even secure than proxy servers and anonymity servers. Following is list of some software that provide free VPN services.

Ultra VPN is one of the most used and most trusted free VPN service of world, if you have problem trusting any other free VPN service better opt this.

The Free VPN

Alone Web

Packetix

Always VPN

Cyber Ghost

Open VPN

Security Kiss VPN

usaip

Macro VPN

Its Hidden

 The problem with which every VPN suffers it speed and bandwidth penalty. Also they need registration, only usaip can be used without registering by using username and password “demo”. The advantage they have above Anonymizers and proxy servers is that you don't have to bother about transactional browsing.

Virtual Private Server:

Virtual Private Servers are provided by companies in which each concept of running multiple virtual systems on same system is adapted. Though every PC may be residing on same server but for each individual his system acts as completely separate system. These are most reliable source to stay invisible online but are only offered as paid service.

I hope I have covered enough so that you can have your pick. Don't forget to tell us about your views and experience about using above tools. Please note that no matter which tool you use you will have to suffer speed penalty but sorry that is that cheap cost that you have to pay to browse anonymously and stay invisible online.