ZID offers plenty of services. You might especially be interested in:

• BSCW: Collaboration Server for File-Exchange, Wikis, …:
  

https://bscw.uibk.ac.at/

• CallTrough: University offers private phonecalls at reduced rates (also supports SIP):
  -> Private Calls
• DropInn, a very simple FTP-based DropBox-Alternative, a Fileserver, FTP-Service, …
  -> FileSharing
  
• Version Control Systems:
  SVN: https://lvcs.uibk.ac.at
  GIT: https://git.uibk.ac.at

For a full list of services ZID has to offer see: http://www.uibk.ac.at/zid/services/services.xsql