If you have too many applications 
crowding all the space in Unity launcher, you might be thinking of a 
better way to manage them. Making icons tinier by reducing the icon size
 is one way, but would it not be better if you could group a bunch of 
icons? This is what we already do in Android and iPhones. Group the apps
 together and save the screen space.
LauncherFolders
 is one such application for Ubuntu Unity that allows you to group apps,
 files, folders, chrome web apps, links and shell scripts in folders. 
And these folders then can be used directly in Unity launcher. Reminds 
of another similar tool Drawer, isn’t it?