Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Plivo - Plivo simplifies your customer engagement.