Solaris Sky Calendar - An astronomy calendar right in your pocket

Prezi - Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.

Sundial App - Sun & Moon times and alerts for iPhone, iPad, & Apple Watch

Reveal.js - A framework for easily creating beautiful presentations using HTML

CARROT Weather - An eerily accurate weather app with hilarious forecasts

Google Slides - Create a new presentation and edit it with others at the same time — from your computer, phone or tablet. Free with a Google account.