[Editor's Note: This resource is actually an SDK, not a library. It has been reprofiled as the Vonage SMS Python SDK by Marco Londero.]
Nexmo Python Library by Marco Londero is a library for working with the Nexmo SMS API, written in Python.
Twilio has launched the Message Feedback API which monitors when end users receive messages. The API tracks actions that indicate when a message was received and reports the action back to Twilio. In turn, Twilio can tweak its services and delivery to adjust for network variances across the globe.
Earlier this year Sendbird announced the Sendbird Calls API to add platform support for voice and video capabilities over IP. Since that time the company had been updating the API and has now announced a new self-service option for the Sendbird Calls APIs.