At a company I joined recently (WPEngine), there's an app called 15five deployed internally, where every 2 weeks we're encouraged to single out some coworkers w

At a company I joined recently (WPEngine), there's an app called 15five deployed internally, where every 2 weeks we're encouraged to single out some coworkers with "high fives", thanking them for whatever we want. Those are then visible to us and our managers (and by default are also shared publicly in a special purpose chatroom). I am really impressed that this is systematically implemented and encouraged throughout the whole company!