The map:

http://www.openstreetmap.org/relation/2315704

• Putting data in: ID editor | JSOM | Bulk submissions
• Getting CAD data out: https://cadmapper.com/
• Handling Addresses globally: http://openaddresses.io/
• US State Department: http://mapgive.state.gov/

Companies working in this space:

• Mapbox: https://www.mapbox.com/
• CartoDB: https://cartodb.com/
• Mapzen: https://mapzen.com/
• Mapsense: http://www.mapsense.co/
• Mapkin: http://beta.mapkin.co/
• Mapillary: http://www.mapillary.com/

Interesting Tech:

• Mapsense: http://www.mapsense.co/developer/ | http://development.diff2.divshot.io/
• OSM3DBuildings: http://osmbuildings.org/?lat=52.52111&lon=13.40988&zoom=16
• Mapzen: https://mapzen.com/projects/tangram

Applications:

• Default map for major NGOs/development orgs
• https://github.com/WorldBank-Transport/open-transit-indicators
• http://opendata.arcgis.com/
• https://buildinginspector.nypl.org/
• OpenCities: http://www.opencitiesproject.org/about/