Click here for an article at ChromeUnboxed featuring the "New Productivity Launcher" that brings a clean fast interface for accessing your Apps.
The Launcher icon is by default located in the bottom left hand corner of your Chromebook's screen, you can however move it if you opt to display the whole Launcher area at the side of the screen instead.
When you tap on the Launcher icon you get access to a screen that displays a Search Box and up to 5 recently used Apps.
These are followed by individual Apps, or App Groups, showing all installed Apps in a similar way to opening the 'App Drawer' on an Android phone.
As you accumulate more Apps this single screen overflows into multiple screens that can by accessed by clicking the corresponding 'radio button' or using the PageUp / PageDown keys.
Click here for an article at ChromeUnboxed called "Tips and Tricks for Organising your Chromebook's App Launcher" that suggests many ways you can arrange the Apps to best suit your personal needs and workflow.