DarkSites.com

Stellarium

Free open source planetarium for your computer

Sky Guide

AR sky map for iOS with beautiful star and constellation illustrations

SkySafari

Powerful astronomy app for both iOS and Android

NASA's Eyes

Visualize NASA's fleet of Earth-observing satellites

International Dark-Sky Association

Leading organization combating light pollution worldwide

Globe at Night

Citizen-science program for monitoring light pollution

Astronomers Without Borders

Connecting people worldwide through astronomy

Dark Sky Sanctuaries

Certified locations for exceptional starry nights