I would like to introduce GEM, a GUI for Elasticsearch Mappings. Here is the github link.
GEM is at the first step towards true data modeling where it makes the mappings process very accessible. For someone coming from a SQL background, mappings in Elasticsearch are interesting because of it's nature of being both a search engine and a data store suited for exact queries and aggregations.
Would love it to eventually have some intelligence and heuristics built in, like recommending what data types to choose, data normalization patterns.
A preview of how it works -