The multitasking screens of iOS 7, Windows Phone, and webOS.
iOS 7's integrated weather app versus Yahoo's recently-revamped iOS app.
Settings toggles are new to iOS 7, but they've been a common feature on other phones — this Galaxy S3, for instance.
iOS 7's redesigned messaging app has a good deal of visual overlap with Windows Phone's.
Many have been quick to point out that the design and color scheme of the "parallax" wallpaper demoed on stage at WWDC is strikingly similar to the active wallpaper that ships as default on stock Android.
The order of the buttons is different, but iOS 7's call answer screen shares its layout with Windows Phone.
iOS 7 introduces new swipe gestures to move in and out of screens in apps. Other platforms, like BlackBerry 10, have fully embraced swiping from the bezel.
The current iOS calculator is one of its most recognizable designs, famously borrowed from a Braun calculator. In iOS 7, it moves to flat, square buttons, not unlike Windows Phone's calculator app.