AirPort Flow is a small utility to monitor the transfer rates on an AirPort Extreme. The rates are polled from the AirPort Extreme by SNMP. The top graph shows the incoming TCP traffic to the router and the lower one shows the outgoing TCP traffic from the router on a given interface.
Bonjour Browser lets you browse all the Bonjour services available on your local network. This application will show you all the known Bonjour services available and what computers have them, along with any extra information given with the service.
MacTelnet is a complete terminal emulator for Mac OS X, for use with local or remote applications. It is also available for Classic Mac OS as a remote-only shell. It supports VT100, VT102, VT220, and parts of XTerm and ANSI, UTF-8 and other character sets, very accurate rendering of CP437 for use in BBS games, regular or tabbed windows, a full screen mode that works on up to two displays, dynamic search, powerful macros for entering text, running commands, and opening URLs, extensive preferences, including a flexible coloring and formatting system, Workspaces that spawn commands and auto-arrange windows, Growl notifications, text capture, floating keypads for control keys, and more.
Meerkat is an easy to use SSH tunnel manager built specifically for the Mac. It uses an innovative Tunnel Setup Assistant, key components of Mac OS X, and community features like Growl and Sparkle.
NetGrowler displays pop-up notifications on network events (joining new wireless networks, IP address changes, etc.) through Growl.
NetLocation X is an automatic /etc/hosts updater. NetLocation X?s monitor intercepts network change notifications, sent by the kernel and updates your system automatically.
PacketForward is an IP packet capture/forward application based on libpcap and libnet. It is a command line tool that listens on one network interface for UDP and TCP packets and then injects them on the same or another network interface changing the destination address.
Path Analyzer Pro
(commercial) Path Analyzer Pro integrates advanced traceroute software (based on the open-source tool LFT) with performance measurements, DNS, whois, and specialized network resolution to help investigate network issues.
(commercial) Paw is a full-featured Mac app that makes interaction with REST services delightful. Whether you are an API maker or consumer, Paw helps you build HTTP requests, inspect the server's response and even generate client code.
tcpdump is a common computer network debugging tool that runs under the command line. Read more