Shaperprobe

ShaperProbe detects whether your ISP performs traffic shaping. Traffic shaping means that your ISP automatically drops your access rate after you have downloaded or uploaded a certain number of bytes. ShaperProbe detects whether traffic shaping is used in either the upload or download directions, and in that case that it is used, ShaperProbe reports the shaping rate and the maximum burst size before shaping begins.

Run ShaperProbe on Windows

Run ShaperProbe on Mac OS X 

Download command line client 

The current version does not work on Windows 7.

Data collected by ShaperProbe is available in raw format at https://storage.cloud.google.com/m-lab/shaperprobe.

Source code is available at https://code.google.com/p/shaperprobe/.

More information at http://www.cc.gatech.edu/~partha/diffprobe/shaperprobe.html