The August 2013 (1308) version of the SAP Cloud Applications Studio is now available for download on the Service Market Place. You may use the following link to directly access the studio with its versions on the Service Market Place or you may search for SAP SOLUTIONS ONDEMAND STUDIO and drill down to the required version.
Please note that as of version 1308 (August 2013) SAP Cloud Applications Studio is the new name of the previously named SAP Solutions OnDemand Studio. The name SAP Solutions OnDemand Studio still applies to versions 1302 (February 2013) and 1305 (May 2013) of the Studio. Versions 1302, 1305 and 1308 can be installed in parallel. You need to use the studio version matching to your tenant version. This means for example that you cannot logon with the 1308 studio to a 1305 tenant or vice versa.
For information on the SDK Documentation for version August 2013 (1308) please refer to Mariannes document.