Trello - When signing up, Trello asks you to confirm your email and gives you a direct link to whichever email service you use.
/via Tyson Gach
West Elm - Gives you the option to just dial down email frequency when unsubscribing from their newsletter.
Disqus - The signup form guesses your name based on the first part of your email address as you type.
Campaign Monitor - The favicon shows a closed email when logged out, and changes to an open one when logged in.
GelaSkins - Newsletter uses out of the ordinary copywriting to offer to users the browser version.
Wunderlist - The desktop version has one form for both signup and login.
/via Denise Pires
Mailchimp - As you stretch the browser window the arm of the chimp stretches till it “pops” off!
Gmail - Suggests other people you might want to mail to as well, based on previous group emails you’ve sent.
/via Tal Benisty
Gmail - Clicking one label applies the label but you can check several boxes to apply multiple labels at once