NASA Worldview
An open source code app from NASA’s EOSDIS that provides the capability to interactively browse over 1000 global, full-resolution satellite imagery layers and then download the underlying data.

Light Pollution Map
A mapping application that displays light pollution related content over Microsoft Bing base layers (road and hybrid Bing maps). The primary use was to show VIIRS/DMSP data in a friendly manner, but over the many years it received also some other interesting light pollution related content like SQM/SQC measurements, World Atlas 2015 zenith brigtness, almost real time clouds, aurora prediction and IAU observatories features.

Dark Sky meter App
The Award winning Dark Sky Meter by DDQ helps you measure the night sky brightness with the press of a button. Get instant information about the night sky quality and contribute to create a global map of sky darkness.

Loss of the Night App
The Loss of the Night app turns your eyes into a light meter, allowing you to become a citizen scientist and report how bright the night sky is where you live!

F.lux
f.lux is a color temperature app that makes the color of your computer’s display adapt to the time of day, warm at night and like sunlight during the day. It makes your computer screen look like the room you’re in, all the time. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.

Twilight
The Twilight app makes your device screen adapt to the time of the day. It filters the flux of blue light emitted by your phone or tablet after sunset and protects your eyes with a soft and pleasant red filter. The filter intensity is smoothly adjusted to the sun cycle based on your local sunset and sunrise times.

Stellarium Mobile
A next generation astronomy star map app. It combines a realistic and accurate night sky simulation with a gigantic amount of online imaging and sky objects catalogs. With over ten million downloads.

Light Pollution Simulator
A light pollution simulator aimed at demonstrating the impact of artificial light on the observation of the night sky. Just click on the image (moon, house or place in front of it) to add lights, then on the lights to change their configuration.