Boomerang!

Gmelius offers an intuitive and simple way to make Gmail the way you want it. Install it, activate the features you need in the options screen and Gmelius will do the rest.

Email followups, scheduled as easily as this: [email protected]. Clear out your inbox by forwarding emails to FollowUpThen. Make sure your emails get responses. SMS Reminders. Easy reminders — an email away.

Accurate email tracking, automated followups, prospecting, mail merge, meeting coordination, sendlater, snooze, undo, and snippets for Gmail.

FollowUp.cc was created to let people attach reminders instantly to any email. Since then, users have been scheduling their to-do list, scheduling tasks for others and keep conversations on track!

SalesHandy is sales engagement platform. It provides email tracking, mail merge, document tracking & email scheduling. It allows user to send mass personalized email using mail merge, from gmail or their own SMTP servers.

Track, automate, and enhance your emails with the essential productivity suite for Gmail and Google Inbox.

Enables you to snooze emails in Gmail.

Yesware is an all-in-one sales toolkit. Track emails and presentations, create templates, log calls to CRM, and more, right from your inbox.

Generate new leads from accurate sources of prospects, and kickstart your Lead Relationship Management strategy with Outbound Sales campaigns.

Send engaging emails with instant scheduling, free unlimited email tracking, polls, and surveys right in Gmail.

Schedule Emails in Gmail To Be Sent LaterRight Inbox integrates seamlessly with Gmail and lets you schedule your emails to be deliveredat a future time

SendRecurring is a web based tool for scheduling email and text reminders. It makes it easy to keep yourself or a group of people aware of anything important.

Send personalized bulk email and set up powerful follow-up sequences to get more replies. Start sending smarter emails and reach more people in less time.

Laytr is the easiest way to defer emails. It lets you schedule outgoing correspondence, snooze incoming e-mail and set reminders of important messages.

Bumper is a stripped down version of FollowUpThen, followup.cc and nudgemail that lets you host your own email reminder service.