pinboard.in - When changing your password, the new password text box uses a low contrast font and forgoes the typical type-your-password-again pattern.
/via Lenny Sirivong
Wunderlist - When tapping the button “Forgot Password?”, it’ll automatically use the email previously used while trying to sign in.
/via Jacob Klapwijk
Webkit - When entering text into a password field in WebKit based browsers (f.e. Safari & Chrome), a small icon will appear if caps lock is activated
/via Tobias Michealson
Reddit- Login form shows orange frame around password recovery link after wrong password.
Wunderlist - The desktop version has one form for both signup and login.
/via Denise Pires
Typinator - Menubar icon dims when you activate password / security form fields.