SendRecurring - SendRecurring allows you to setup, send, and maintain scheduled email reminders.
Upcall - Upcall enables you to crowdsource your outbound calls. Collaborate with 1000+ on-demand callers worldwide for sales, marketing and customer support calls. Free trial.
Recurrr - Send recurring emails
Vipor CRM - Relationship management. Redesigned.
FollowUpThen - The simplest way to schedule an email reminder
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.