Mobicents JAIN SLEE binary releases can be downloaded here.
Binary Release Snapshots
Each day a new binary release snapshot is built and tested, see the job details and download the last build at Mobicents JAIN SLEE 2.x Jenkins Job
The Mobicents JAIN SLEE source code is available in the Mobicents Google Code SVN Repository, browse the sources through the following links: Mobicents JAIN SLEE 2.x Source Trunk
Note that the same URLs can be used in any SVN Client, for anonymous checkout.