Want to schedule an email to be sent at some specific time then here is a plugin for you. Well if you use Gmail mostly and want to schedule an email so that it can be sent even when you are not able to log back in then this plug-in would surely help you.
Boomerang for Gmail is a plug-in for both the Google Chrome and Firefox browsers that can enable you to schedule the emails to be sent when you are unavailable. Although this add-in helps in scheduling the emails but this can also be used to set reminders.
So if you just wish to send emails later or use the reminder feature in your Gmail inbox, this is the plug-in to use.