There are a few. Mongo has excellent integration with Hadoop and is becoming very popular in the big data analytics space. Likewise it is gaining traction in the EDW space as a result of their partnerships.
Also it stills remains one of the simplest databases to setup and use making it still my goto for hacks/spikes.
Also it stills remains one of the simplest databases to setup and use making it still my goto for hacks/spikes.