Shapr - A completely free way to build your professional network.
Mapbox - An open source mapping platform for custom designed maps. Our APIs and SDKs are the building blocks to integrate location into any mobile or web app.
Event Hunt - Startups and Tech Events Curated By Locals
QGIS - QGIS is a desktop geographic information system, or GIS.
GetReal - Meet new people, in person
OpenStreetMap - OpenStreetMap is a map of the world, created by people like you and free to use under an open license.