Solaris Sky Calendar - An astronomy calendar right in your pocket
Sketch - Professional digital design for Mac.
Lumy - Helps you track photographic times
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Sundial App - Sun & Moon times and alerts for iPhone, iPad, & Apple Watch
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.