Although Hamachi is free and small VPN software, it has many amazing feature for a free software and very easy to install. Hamachi is even easier to install compared to other VPN tools such as OpenVPN.

After you install Hamachi, you could instantly create virtual network for several PCs (max about 16 PC) connected to the internet. Before you create or join a network, you will get a Hamachi ID, which is a unique IP address from Hamachi server.