SBPowerAlert cydia tweak is a simple popup with several options. It allows you to reboot your device, power it down, respring it, put it into safe mode and lock it.
Moreover it displays the available RAM as the title of the Alert.
It is a small replace for SBSetting’s Power Alert, since SBSettings is not compatible with iOS 7 yet.
After the Installation a respring it required. Then you can open Activator to assign an Event to SBPowerAlert. Once you set an Event for SBPower to launch (for example swipe right on the status bar) you can trigger the event and the SBPowerAlert will show.
Configure Activator in Settings.