The description of qshutdown from its web site: qshutdown is a slim program to shutdown/reboot/suspend/hibernate the computer. It is a grafical tool that shows the time until the corresponding request is send to the gnome-, kde-session-manager or to HAL/DeviceKit if the first two won’t do. Otherwise the command ‘sudo shutdown -P now’ is used. This program may be useful for people who want to work with the computer for a certain time.
qshutdown works on various OS (Ubuntu, Kubuntu, Xubuntu…. (possibly even on Unix like FreeBSD – I have not tried yet)).

Install qshutdown in Ubuntu:

qshutdown is available in Ubuntu’s universe repository, it can be installed via Ubuntu Software Center, but it’s old.

For the latest, add this ppa:

sudo add-apt-repository ppa:hakaishi/qshutdown

Then update the source:

sudo apt-get update

Now, qshutdown in Ubuntu Software Center is updated.