proto-athena (soon to become alfresco-site-tenant) is a project composed by a Repository and a Share Alfresco Module Packages (AMPs) that implement the Alfresco multi-tenancy use case using Alfresco Site as Tenant.
This means that users of different sites can never access the same data, unless explicitly configured by an admin.
Although Alfresco Site were supposed to be designed with isolation in mind, there are still some parts of the system (such as users, groups and workflows) that are shared across sites: this modules will allow Site Managers to whitelist groups and workflows that need to be shown/chosen/configured within a given site.
You can access the publicly available (released and nightly-built) binaries with the following URL
http://repository-maoo.forge.cloudbees.com/release/co/uk/rrd/alfresco
Follow the steps to install it in Alfresco.
Proto-athena was developed and tested against Alfresco Enterprise 4.2.2
cd proto-athena-repo
mvn [clean] integration-test -Pamp-to-war [-Ppurge]
cd proto-athena-share
mvn [clean] integration-test -Pamp-to-war
mvn deploy
mvn release:prepare release:perform