WAVcheck is a free Windows desktop application that currently identifies 27 different web analytics and tracking vendors based on data found on page scripts. It was built to run on Windows XP so shelf life is very much exceeded, but feel free to use it on your own risk.
NOTE: The last update was the 1.0.3 version in 2006!
Simply download the ZIP fil, extract the 2 files, run WAVcheck.exe, specify the website you'd like to check and slap the Web Analytics Vendor check button.
Download your free copy of WAVcheck here [3.65 Mb]