Google+ - When posting a link to Google Plus, it replaces the URL with the title of the page the URL points to.
/via Wouter van Vliet
Amazon - After completing your order, the page title changes to: “Amazon.com Thanks You”
/via Steven Scarborough
Vimeo - When visiting a non-existing page on Vimeo, the title is VimeUhOh.
Twitter - When moving the mouse over a tweet, the name fades out to show the performable actions.
/via Benjamin Trinczek





