School 2.0 Bandwidth Calculator
The Bandwidth Planner was created by the U.S. Department of Education. It aims to help school principals and district CTOs plan their bandwidth needs, demystify bandwidth for non-technical educators, and bridge the knowledge gap between educators and IT personnel

Bandwidth Thermometer
Compares and contrasts use of the Internet, cell phones, and broadband. A “thermometer” comparing the three groups is provided here.

Bandwidth Speed Test
Graphical speed test

CNET Bandwidth Meter
Allows you to check your bandwidth connection

TCP/IP Analyzer from Speednet
The SpeedGuide TCP/IP Analyzer is a program designed to display your Internet connection parameters.

DSLreports: Line Quality Testing
If you are HAVING TROUBLE with your broadband connection, and it relates to packet loss, excessive latency, or internet or ISP congestion, this test may help find the cause.