speed.io - Internet DSL Speedtest

Internet Speed Tests seem to be a 'dime a dozen' these days. This one seems to be fairly thorough, requires no installation, and if it's true they have 50k different servers around the world, you're likely to get a fairly accurate result.

I recommend running at least 2 or 3 different speed test sites if you want an accurate measurement.

Speakeasy has had a speed test up for years and I like how they let you specify different server locations around the US.

http://www.speakeasy.net/speedtest/

speed.io - Internet DSL Speedtest