#5: CyberGhost
This is a German-based company offering free and premium services. The monthly traffic limit is 1 GB, which is enough for most to use occasionally. However, you'll find the overall solution to be more bulky than the others.
The installation is straightforward. Although the Microsoft .NET 3.5 Framework is required, the CyberGhost installer will download and install it.
When you bring up the client for the first time, you'll see a button to create an account. It's not particularly complex, but you must do an email verification.
Once you log in, you'll see the main CyberGhost client. To use the free service, hit the Connect Basic button and wait for it to connect.
From the client you can also view your usage, settings, and exceptions. When you close the client, you still have the system tray icon.
Simply right-click it for all the shortcuts.