Ars Technica: “Google Inbox has been dead for nearly three years, but the people have not forgotten. Google promised to bring many of the innovations of Inbox to its surviving email client, Gmail, but never really did. If you still miss Inbox and how easy it made managing email, maybe the time has come to venture outside of Google’s client offerings. Meet “Shortwave,” a new email startup from a few former Googlers that exactly replicates the Google Inbox interface. Every major innovation from Inbox is back: emails get collected up into “bundles” called things like “updates,” “promotions,” and “social,” and messages can also be categorized by age. Critically, the “Sweep” button is back, which lets you mark multiple emails in a bundle as “done” with a single click…”