Mustache

Mustache for eMail Templating....

Node-RED

An amazing little message broker / flow manager...

Need to learn this in 2016...

http://nodered.org/docs/getting-started/installation

The download link was broken when I did it, so I just backtracked and pulled from here:
https://nodejs.org/dist/latest-v4.x/

The install takes a couple minutes

No-SQL

Learn CouchDB... it's what Cloudant is based on.

http://couchdb.apache.org/

JSON described arbitrary data.

MapReduce...