Postman - The Collaboration Platform for API Development
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Apiary - Collaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing
Clever - syncing between education applications for K-12 schools
Django REST framework - Django REST framework is a toolkit for building web APIs.
Claroline - Claroline is a collaborative eLearning and eWorking platform.