Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
Followup.cc - FollowUp for email is a lightweight productivity suite that keeps your conversations and tasks from slipping through the cracks. Set perfectly timed reminders that arrive at the top of your inbox, right when you need them.
FollowUpThen - The simplest way to schedule an email reminder
Everypixel - Stock Image Search Engine That Filters Out Trash. Made for designers who hate bad stock images.
Gmelius - Gmelius is the first collaboration platform designed for G Suite and your company's daily tools.
Dashmote - Dashmote bundles stock image providers to make finding stock images as easy as possible.