Download ProtoMS
ProtoMS is available under an open source (GPL) license.
Download the latest version here
ProtoMS is developed on a publically visible subversion repository. You can view that repository by visiting the Google Code project pages for ProtoMS. From these pages you can also browse the source code.
You have two choices if you want to download ProtoMS. You can either choose a stable version, which is available here, or you can download the code as it is being developed. You can do this by downloading from the public subversion repository using your favorite subversion client, e.g. by typing;
svn checkout http://protoms.googlecode.com/svn/trunk/ ProtoMS