Pasmon is a graphical passive network monitor. It provides statistics on every host and TCP connection heard on the specified interface[s], probes the system to find valid devices and provides a toolbar button which activates monitoring each device. Currently stable, but with missing features. Screenshot here.
You can download it from the following link: https://packetstormsecurity.com/files/download/11586/pasmon-0.5.tar.gz
Source: https://packetstormsecurity.com/files/11586/pasmon-0.5.tar.gz.html