Out of the box services


I have noticed that some services are supported out of the box for authenticating the user, like mailchimp with the example below.
What other services are supported in a similar fashion? I am specifically interested with Google in order to integrate with google drive.
What’s an alternative way of doing that if that is not support out of the box?

"account": {
        "title": "Choose Service Provider",
        "type": "object",
        "format": "account",
        "services": ["mailchimp"],
        "order": 0,
        "description": "Login with your account to fetch your Mailchimp account profiles.",
        "required": true