Mac: Ever wondered where your applications send and receive data from? Private Eye is a real-time network-monitoring app that shows you live connections from your open software, as well as where the data is being sent.
Private Eye displays all connections your applications have to the web, as well as the time and the IP address connected to the software. You can then filter those results by app, or by incoming and outgoing traffic. Private Eye doesn't have the power to alter any of these connections once they happen, but it does give you enough information to know if an app is connecting somewhere it shouldn't be. If you're interested in security, or you just want to track where your apps are sending data, Private Eye is a free utility that's easy to use. If you want to stop those network connections, we like the lightweight firewall utility Radio Silence, which is developed by the same people behind Private Eye.