[collyw]

MEAN.

Mongo, great for unstructured data where horizontal scalability is important. Node great for many concurrent asynchronous connections. Angular is apparently very good at what it does, but is probably overkill unless you want to specifically develop larger scale single page apps.

On the other hand if you want to develop useful software quickly and efficiently for the other 95% of use cases, choose something more general purpose like a relational database and Rails / Django.