Inbox by Gmail. Bundles were great. The ability to view just the pinned emails was very useful for prioritization. And you could enter your own reminders instea

Inbox by Gmail. Bundles were great. The ability to view just the pinned emails was very useful for prioritization. And you could enter your own reminders instead of sending an email to yourself. Some of the other features (like email snoozing) made it into the main Gmail product. Also, I miss Windows Phone. I was really hoping that one of the alternative OSes that were floating around 2014 or so would make significant inroads into the US phone market. Windows Phone, Blackberry 10, Sailfish, Firefox OS, Tizen, Plasma Mobile. I got to try several of these! That was an interesting time.