Call Meter 3G - Call Meter 3G is an app that acts as a monitoring tool for all your calls, messages, and internet data.
TinyWall - Lightweight and non-intrusive firewall
Data Usage - Data Usage Monitor | Your guard against data plan overages.
SonicWall - SonicWall security solutions protects your network, systems, users and data from cyber threats.
DataMan – Data Usage Widget - DataMan – Data Usage Widget is an application that enables its user to know how much data he has spent from the total internet package he is using.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more