AppJump Launcher is a handy, drop-down launcher for your Google Chrome Apps
In addition to adding a handy drop-down panel from which you can launch your Chrome Apps, AppJump also allows you to create groups, which lets you categorize things for quick drill-down access -- which will be very useful once you've accumulated a few dozen apps.
One feature which is missing from AppJump is drag-to-reorder (which is also missing from the Chrome new tab page). I'd love to be able to move my apps around and sort them however I choose, but for right now you're stuck with whatever layout AppJump displays.
Install AppJump Launcher for Google Chrome