TiltMaps - Create map posters of your favorite places & memories.
Stellarium - Stellarium is a free open source planetarium for your computer.
Grafomap - A map poster of your favourite place on earth
Planetarium - A browser-based virtual planetarium of stars and planets, customizable to any location and time.
Craft & Oak - Beautiful, minimalistic custom map posters
SkyView - SkyView is powerful, easy-to-use app that answers questions about stars, constellations, and more.