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Whowatch

Whowatch is an interactive who-like program that displays information about the users currently logged on to the machine, in real time. Besides standard informations (login name, tty, host, user's process), the type of the connection (ie. telnet or ssh) is shown. You can toggle display between users' command or idle time. You can watch processes tree, navigate in it and send INT and KILL signals.

Many thanks goes to Peter Kelemen who is Debian maintainer for whowatch (see Debian package)
A binary package for the NetBSD (Intel architecture) is available at ftp.netbsd.org (thanks Rene!)
A binary package for the FreeBSD (Intel architecture) can be downloaded from here (sysutils section on ftp.freebsd.org)

Read more...
http://wizard.ae.krakow.pl/~mike/

Don