WARNING: THIS PAGE IS SPREADING MALWARE. DO NOT DOWNLOAD. If you try to download Noisy from this page, it tells you that you are downloading Noisy, but in fact it tries to install some other software, not Noisy, which contains unknown content. Several sources have reported that "MacUpdate Desktop", the program it tries to trick you into installing, contains malware. Don't believe me, Google it yourself.
If anyone is interested, I cloned the project over to Github, and modified it to read ~1MB of data from /dev/random and loop over that. It cut down on the cpu utilization significantly (from 5-6% on my macbook pro to 0.5-0.7%)
You can get it from the download section of my project page, here:
or you can download it directly here: