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GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
Gas Mask - Gas Mask is simple hosts file manager for Mac OS X.
TinyWall - Lightweight and non-intrusive firewall
SwitchHosts - Free and open source hosts management & switching app
Little Snitch - Little Snitch is a firewall application that monitors and controls outbound internet traffic.
BlueLife Hosts Editor - BlueLifeHosts editor is a Portable freeware application for editing windows Hosts file ,(easily add/delete , Block , Update domain names)