Bumper

Bumper is a stripped down version of FollowUpThen, followup.

Boomerang for Gmail

Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.

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Create, manage and deploy beautiful customized HTML signatures in any email client.

EmailPlayground provides solution to schedule and send emails with ease.

Email Scheduler provides an intuitive email scheduling solution, integrated within the existing Salesforce account.

Schedule Emails in Gmail To Be Sent Later

SendRecurring allows you to setup, send, and maintain scheduled email reminders.

Seventh Sense helps marketers and sales professionals reach the people that make them successful using artificial intelligence powered email.