Boomerang is an email extension for Gmail that helps you to manage your email better by automatically saving and sending important messages.
It also allows you to schedule messages for a later time, and it has a "snooze" feature that allows you to postpone a message for a set period of time. Additionally, Boomerang has a "grab attention" feature that interrupts your current task to grab your attention and tell you that there is a new message. Finally, Boomerang integrates with Gmail's "Compose" feature to allow you to easily create and send new messages.
Overall, Boomerang is an excellent email extension that can help you to manage your email better and keep your inbox organized. It also has a "grab attention" feature that can help you to stay on top of your inbox and respond to messages quickly.