The Informatics Software Download Database (ISDD) is a utility to help academics and students assign appropriate licences, often some form of open source licence, for their software. It is not intended to be a SourceForge-style utility for code management – it is simply a software repository like FTP.
The database is also a way for the School to keep track of download activity so that it may be claimed in the research excellence framework. If your software is not in the ISDD, download activity will not make it into that assessment.