Inbox, from Gmail.
I heard about it yesterday and thought I'd like to give it a try. Basically it's a small programme you use to view your gmail that groups it together into categories, like adverts, social media, finance, purchases, etc. You can define, rename and change your groups, or "bundles" and it enables you to prioritise according to the type of email.
You can also write yourself little reminders and prioritise emails within their bundle.
But for the moment you have to wait till Google invites you to try it. You can ask them for an invitation, but that's it.
I asked. And thought no more about it.
This morning my invitation came. And it's AMAZING!