ProteMac has released ProteMac Meter 1.0
(http://www.protemac.com/Meter/), a network Activity monitor and
network traffic logger utility for Mac OS X. It costs US$29.95 for a
single-user license.
ProteMac Meter shows information about each connection: application
network connections, host availability, remote host name, amounts of
incoming and outgoing traffic through connection or application,
timestamps of the first and last activity, application that initiated
or accepted this connection, full path to the application the process
belongs to, and more. The traffic summary indicator shows an upload
and download speed graph and traffic totals specially for selected
application.
You can view all established connections, monitor network and per
application traffic over a certain period, setup various
notifications and much more. You can use ProteMac Meter right from
your menubar.