1)   LinkFerret Network Monitor 3.12.0516.0
LinkFerret is a versatile Ethernet/ 802.11 network monitor and packet sniffer. All of the essential wireless monitoring functionality, including signal monitoring, channel scannning, and WEP decryption are supported.

 2)   EtherSnoop 1.10
EtherSnoop light is a free network sniffer, designed for capturing and analysis of the packets going through the network.

 3)   What Is Transferring 1.0
capture and analyze network traffic on your network.

 4)   EtherDetect Packet Sniffer 1.2
EtherDetect is an easy for use and award-winning packet sniffer and network protocol analyzer, which provides a connection-oriented view for analyzing packets more effectively. With the handy tool, view connections, packets and data on the fly.