Main purpose of this project is easy to use geocoder/geoindexer.
Project consists of two parts: Gazetteer and GazetteerWeb
Gazetteer used to parse osm data and do all dirty work with geometry.
You can use Gazetteer as standalone osm processor, to dump addresses from osm.
You can ignore GazetteerWeb and use data in your own geocoding/geosearching applications.
Take an osm.bz2 dump and generate json with
Details are here https://github.com/kiselev-dv/gazetteer/tree/develop/Gazetteer
You could find data extracts here: http://data.osm.me/dumps/
GazetteerWeb is a second part of the project. You may take it as example implementation of search engine for Gazetteer generated data or use it for your own purposes.
Details are here https://github.com/kiselev-dv/gazetteer/tree/develop/GazetteerWeb