If No Reply - Simple email automation that works for Gmail
Boomerang Premium - Schedule email to be sent later, now w/ Premium features
Assistant.to - GoToMeeting. Put your GoToMeeting link in the Assistant. to "Location" field. Once the recipient selects a time, you will both receive an invite with a unique GoToMeeting link.
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
SendLater - Email scheduler for Mac Mail.
Fridai - The voice assistant for gamers 🗣️👾