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.
Marline - Discover weather, tides and moon, like never before
Microsoft PowerPoint - Microsoft PowerPoint empowers you to create clean slideshow presentations and intricate pitch decks and gives you a powerful presentation maker to tell your story.
Sundial App - Sun & Moon times and alerts for iPhone, iPad, & Apple Watch
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.