Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Postman - The Collaboration Platform for API Development
Parse - Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box.
Apiary - Collaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing
AnyPresence - AnyPresence is an Enterprise Backend as a Service for mobile app development and API augmentation.
Django REST framework - Django REST framework is a toolkit for building web APIs.