Simple Poll - The easiest way to create polls in Slack
Stellarium - Stellarium is a free open source planetarium for your computer.
GitHub Polls - Polls for GitHub issues and readme
KStars - KStars is a Desktop Planetarium for KDE.
minipoll - Create simple shareable polls in seconds
SkyView - SkyView is powerful, easy-to-use app that answers questions about stars, constellations, and more.