This document discusses OpenStreetMap (OSM) and various applications that use OSM data. It provides examples of successful OSM mapping projects like Mapping Post-Earthquake Haiti. It describes how OSM data can be downloaded and used in GIS software. It lists many OSM-based services, tools, and applications for routing, mapping, mobile use, and more. It also discusses professional and non-professional OSM users and gives examples of OSM activities and groups in Nepal.