The binary distribution of the Alfresco Mobile SDK can be found at the Alfresco Developer's Portal.
Source code distributions
GitHub is used to distribute the source code for the Alfresco Mobile SDK.
The Alfresco Mobile SDK for Android is located on GitHub. The location for all Alfresco GitHub distributions is https://github.com/Alfresco.
The Alfresco Mobile SDK for Android GitHub page can be found at the following URL https://github.com/Alfresco/alfresco-android-sdk.