Design Principles - An open source repository of design principles and methods
CADMAPPER - Instant CAD files for any location on earth
Facebook Design Resources - A collection of free resources made by designers at Facebook
DWGFREE - DWGFREE is an online platform that comes with a comprehensive collection of CAD blocks that can be downloaded without the need for registration.
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
MAPACAD - MAPACAD is an online website that is providing leverage to designers and architectures to have the ability to download CAD map cities that can be directly used in their projects.