SndLatr is a Google Chrome and Firefox extension that allows you to schedule emails to be sent later, reminders and more. SndLatr will send you email automatically at the specified time. Enter a human readable date like “Friday on 9 am” or “1st of next month, 11 am”, or pick a date using the date picker. You do not need to be online at the scheduled date.
Set up reminders for conversations. Reminders bring conversations back to your inbox at a later date. This is a nice tool to keep your inbox clean. Just archive the conversation after setting up a reminder and it will be back in your inbox when you need to deal with it.