"Collect data from satellites for scientific research in weather forecasting."-https://www.camaliot.org/ It's an android app that uses your GPS to help collect data to improve navigation and weather forecasting.
Tag: navigation
Magic Earth
"Turn-by-turn navigation, HD Traffic, OpenStreetMap, 3D maps, Satellite maps, Offline maps and Transit. Entirely free."—https://www.magicearth.com/ A privacy friendly alternative to Google Maps.
cafebedouin.org 