The icon user-trash.png is from the Tango Icon Library
(http://tango.freedesktop.org/Tango_Icon_Library), which is
public domain.

<Information about network_32.png icon>
Icon Pack:Devine-Icons Part-2
Designer:ipapun
License:Creative Commons Attribution (by)

<Information about network_l_32.png icon>
Icon Pack:Blend
Designer:Laurent Baumann
License:Creative Commons Attribution Non-commercial Share Alike (by-nc-sa)