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.
Google Earth Pro - Google Earth Pro allows you fly anywhere around the earth to view satellite imagery, maps, 3D building, and terrain, from galaxies in outer space to the canyons of the ocean.
OpenStreetMap - OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
SAS.Planet - SASGIS - Качаем карты и спутниковые снимки высокого разрешения из различных источников (google, яндекс.карт, kosmosnimki.ru, digitalglobe).
OSGeo - QGIS is a desktop geographic information system, or GIS.
NASA World Wind - World Wind permits any client to zoom from satellite height into wherever on Earth, utilizing great determination Landsat symbolism and SRTM rises information to experience Earth in outwardly beautiful 3D, pretty much as though they were truly there.