Google Inbox

Google Inbox was an experimental email client that introduced features like 'Bundles,' 'Snooze,' and 'Smart Reply' to the masses. It was designed to make email feel more like a task list, which resonated with productivity enthusiasts. Despite its popularity, Google eventually folded its best features into the standard Gmail app and discontinued the standalone service. It ranks well because it was a genuinely innovative take on email that improved workflow efficiency, though its forced retirement frustrated many power users who preferred its unique interface.