Bandwidth Tests

Connection Speed Test - Internet connection benchmarking tool.
http://testmy.net/

Toast Net - Test the speed of your Internet connection. Unlimited tests at no additional charge.
http://performance.toast.net

2 Wire: Speed Meter - Measures current bandwidth speed.
http://www.2wire.com/?p=154

Line Speed Testing - Test your broadband connection. Provides accurate download and upload tests.
http://cristian.francu.com/adsl/index.html

Broadband-help.com - Web based speed and bandwidth test. Analyses speed, quality, round trip. Use to monitor the quality of your broadband provider.
http://www.broadband-help.com/tools/speed-test/

Speed.kify.com - Test your internet connection speed.
http://speed.kify.com

2punk - A free simple internet bandwidth test.
http://www.2punk.net

MySpeed - Testing service measures download and upload speeds for registered users.
http://myspeed.visualware.com

Internet Speed test - Test the speed of your broadband connection.
http://speedtest.raketforskning.com/internet-speed-test.html

TPTEST - Open Source (GPL/LGPL) software suite for testing network throughput (a.k.a. "bandwidth").
http://sourceforge.net/projects/tptest/

CNET: Bandwidth Meter Online Test - Web based tool for testing bandwidth. Includes a service locator for North America.
http://reviews.cnet.com/internet-speed-test/

Online.net - Internet connection bandwidth test.
http://isp.haydont.net

Speed Test Online - Test downstream and upstream connections.
http://www.speedtestonline.com

Downstream speed test - Test your broadband or modem connection.
http://www.acc.umu.se/~aquila/speedtest/

The Speed - Bandwidth speed tests from multiple locations around the world.
http://www.thespeed.com/

AuditMyPC - Internet Speed Test. Detailed testing of upstream, downstream and packet quality for all communications including VOIP.
http://www.auditmypc.com/internet-speed-test.asp

ThinkBroadband: Broadband Speed Test - Web based speed test applet which analyses both downstream and upstream speeds from the UK. Allows graphing of your connection over time.
http://www.thinkbroadband.com/speedtest.html

ToolPanel.org - Web based tool for testing your download bandwidth. Doesn't require any browser plugins.
http://www.toolpanel.org/networking/bandwidthmeter/

Bandwidth Tests - Online 50K download test and links to other web based bandwidth tests.
http://bandwidthtest.info/

PC Pitstop: Download Bandwidth Test - Web based tool for measuring bandwidth by downloading text files of different sizes.
http://www.pcpitstop.com/internet/bandwidth.asp

Beeline Bandwidth Test - Web based graphical (flash) tool to test the speed of an internet connection.
http://www.beelinebandwidthtest.com

Bandwidth-test.net - Free test of internet connection, downstream, upstream and ping.
http://bandwidth-test.net/

Febooti Download Speed - Freeware utility for Windows. Test your internet download speed and estimate download times.
http://www.febooti.com/products/filetweak/members/download-speed/