Besides changing corners, you can also use it to flip-corners too. For instance, you can move your mouse to the corner of your current workspace and adjacent workspace.
Other main features...
*. Fade-out volumes.
*. Start/stop screensaver.
*. Lock screen.
*. Dim laptop back-lit.
*. Put the PC to stand-by, suspend and off modes.
If you want to install Brightside in Ubuntu, then you can easily do that using the Terminal. Simply enter the below command.
sudo apt-get install brightside