You could have downloaded PleaseSleep 2.3 for Mac from our application library for free. Pleasesleep.dmg is the most frequent filename for this app's installer. The actual developer of this free software for Mac is Jerry Du.
The following versions: 2.3, 2.1 and 2.0 were the most frequently downloaded ones by the program users. The unique identifier for this app's bundle is com.dragonone.PleaseSleep. This free app can be installed on Mac OS X 10.7 or later. The program lies within System Tools, more precisely General.
From the developer:
PleaseSleep is a utility software designed for Mac OS X that helps put your computer to sleep when you know some other app is preventing your Mac from going to sleep.
PleaseSleep sits in the background and waits for the sleep timer you set in Energy Saver preferences pane. Depending on the preferences you set, PleaseSleep will try to put your computer to sleep when the scheduled sleep timer kicks in.
You may want to check out more software for Mac, such as Namely, Show Desktop or Stay, which might be related to PleaseSleep.