Pushbullet is already a secret weapon for getting content from one device (or one person) to another -- you can relay your links, notifications, photos and SMS messages with a common app. Today, though, it's getting considerably more powerful. As part of a revamp, Pushbullet's desktop, mobile and web apps are turning into true messaging apps, with easy replies and a quick way to find "pushes" (chats and shared content) from your friends. On Windows, it'll even give you Facebook-style chat heads that keep conversations close at hand. Effectively, Pushbullet is blurring the lines between sharing and messaging -- you don't have to switch apps to talk to a friend after you're done sending a photo to your phone. All of the updates are available now, so you can give this all-encompassing app a shot right away.