When you install a new program, ever wonder who it's talking to? Unsavory developers can sneak spyware onto your system that calls home periodically, sending potentially identifiable details about you and your Internet activities. Little Snitch can help with all of that. While a firewall keeps people on the Internet from getting onto your system, Little Snitch can prevent your system from getting out onto the Internet. After installation, the program will warn you each time an application wants to connect to a website — which you can deny or allow, as you wish.