Google has made their slide out drawer available to the public. I’m wondering what you would like to see in this menu.
Since I’m working on Google Hangouts incorporation I’m thinking of a drop down list of services to pick status/availability/sign-in/sign-out.
Also, I think some quick options should be available like Auto-Open QuickReply.
From here you would be able to see and create scheduled messages.
Let me know what else you would like to see.