Question: What are the differences between the Mongoengine, flask-MongoEngine and Django-MongoEngine projects?

I am using Mongoengine in my Django project. Will I get any benefits if I use Django-MongoEngine instead?

Answer: 
Django MongoEngine aim is to provide better integration with Django - however currently (June 2014) its not stable and the readme says 

> 
> DO NOT CLONE UNTIL STABLE
> 
> 
> 

So beware!
`flask-mongoengine` adds a few helpers to integrate MongoEngine into a Flask application.

* Connection definition in Flask parameters
* `get_or_404` / `first_or_404` shortcuts (abort 404 if document not found)
* paginator added to QuerySet object
* automatic form generation using WTForms

`django` support was pulled off `Mongoengine` into a separate code (`django-mongoengine`). Although it has no release, it seems to be worked on (see the [recent commits](https://github.com/MongoEngine/django-mongoengine/commits/master)).