LinkFerret Network Monitor 3.12.0516.   
by Tuca Software

LinkFerret is a versatile, easy to use, low cost, high performance Ethernet and 802.11 network monitor and packet sniffer. All of the essential wireless monitoring functionality, including signal monitoring, channel scannning, and WEP decryption, are supported. With one tool, the two most common network topologies can be thoroughly covered. No plug-ins or add-ons are required. LinkFerret provides the frame capture functionality that is typically found only in monitoring products many times its cost and it supports a variety of standard trace file and report formats that make it easy to capture, store and share network traffic data. LinkFerret is a simple yet powerful monitor built to fit the needs of the network administrator, protocol developer, and the security-minded individual.