Proxy+ is not only a firewall software but also a tool that provides proxy and email server features. All you need is to be connected to the Internet and you will be able to use these 3 services.
Opposite to other multi-task softwares this won't slow down your computer because it needs very few system resources. Proxy+ is the perfect program for beginners because its interface is easy to understand and is user friendly. Very useful for factories, workstations and places where you need to connect one computer to the another, adding that it's also a very good firewall.
Its compatible with any kind of Windows operating systems.