I’ve been using iOS 8 since the first beta release, which makes it very easy to lose perspective on new features—after all, they’re not new to me. Fortunately, Ged Maheux of the Iconfactory has kept his perspective and details several of his favorite iOS 8 features.
Other notable extensions include PCalc’s Today View which gives you handy computation abilities right from your iPhone’s lock screen and another personal favorite of mine - Add to Wunderlist which lets you add web pages directly to new or existing lists.
iOS 8’s power-user features are deep. Really deep. I think we’re all going to be continually surprised by just how deep over the next few months.