pk-update-icon 2.0.0-1ubuntu1 (amd64 binary) in ubuntu yakkety

 This small tool displays notifications and an icon in the tray area of
 the panel when package updates are available.
 It is primarily designed for desktops which do not already have this
 functionality integrated, such as Xfce.
 .
 Information about updates is queried using the PackageKit service.