MongoDB (from "humongous") is an open-source and a leading NoSQL database, with significant adoption among the Fortune 500 and Global 500 companies.
You can now learn to develop MongoDB apps using Node.JS. The course is offered by none other than the MongoDB company itself that too free of cost.
Here's the link to enroll in the course:
To learn about MongoDB and NOSQL database, visit the below links:
If you are a Java or a Python Developer who's interested in learning MongoDB app development, then you can visit https://education.10gen.com/courses and enroll in the respective course of your choice.