Intercom is one of the most popular live chat services. They've just launched their new messenger. It includes a whole bunch of new features and slick interactions.
A little library that can be used for bursting particles effects. The idea is to disintegrate an element into particles and make it disappear (or vice versa).
tympanus.net
Thanks again for your contributions. Submit and vote on UI designs now to decide what goes in next week's email.