Internet Speed Tests

Speedcheck.org

Internet Speed Tests

Listed best to worst in my opinion. Based on accuracy.

www.speedcheck.org

Speedcheck.org has a great mobile app and web interface.  Not to mention all kinds of help for the everyday user to check their internet speed and troubleshoot any problems they see.

www.testmy.net
www.megapath.com/speedtestplus/
http://speedtest.primus.ca/
www.speedtest.net