The Microsoft/Sysinternals Streams utility can help you do this easily.
Since dir /r
displays ADS, something like dir /r /s | findstr /r "\$"
should also display the names of the files with ADS. If the path is also required, I'm sure dir's output can be chopped up appropriately.
Of course, PowerShell should also be able to do this, but I'm not a PS expert.