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.
Morpholio Trace - Morpholio Trace is widely called to be the dream software of the designers and architect.
QGIS - QGIS is a desktop geographic information system, or GIS.
DWG FastView - DWG FastView for Windows is a lightweight dwg/dxf drawing viewer and editor produced by Gstarsoft, no need of dwg format conversion, vector graph magnified without distortion and full compatible with AutoCAD DWG/DXF.
OpenStreetMap - OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Drawing Desk - Drawing Desk Draw Paint Color, Doodle and Sketch Pad created and published 4Axis Technologies for Android and iOS devices.