The web site for Quantum-ESPRESSO is:
http://www.quantum-espresso.org/
Releases and patches of Quantum-ESPRESSO can be downloaded from this
site or following the links contained in it.
Announcements about new versions of Quantum-ESPRESSO are available via a low-traffic mailing list Pw_users: (pw_users@pwscf.org). You can subscribe (but not post) to this list from the PWscf web site.
The recommended place where to ask questions about installation and usage of Quantum-ESPRESSO, and to report bugs, is the Pw_forum mailing list (pw_forum@pwscf.org). Here you can obtain help from the developers and many knowledgeable users. You can subscribe to this list and browse and search its archive from the PWscf web site. Only subscribed users can post Please search the archives before posting: your question may have already been answered.
If you specifically need to contact the developers of Quantum-ESPRESSO (and only them), write to pwscf@pwscf.org.
Other pointers:
DEMOCRITOS:
http://www.democritos.it/
INFM:
http://www.infm.it/
CINECA:
http://www.cineca.it/
SISSA:
http://www.sissa.it/