Given that you have reached this page, you are most likely a reviewer for MMSP 2011.
The first publically available of crowdMOS is crowdMOS-0.1.zip.
The crowdMOS package for region of interest identification is crowdMOS-ROI-0.1.zip.
The Flash player sources and binaries for region of interest identification are part of MTurkPlayer-0.1.zip.
By the time of MMSP 2011, these tools will have undergone a code review and will have received proper licensing for free use and public distribution. CrowdMOS will then be available on the Microsoft Research downloads page and on crowdmos.org. Please do not redistribute this code at this time, as it still does not contain an appropriate license. Thank you.