Solaris Sky Calendar - An astronomy calendar right in your pocket
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Lumy - Helps you track photographic times
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Sundial App - Sun & Moon times and alerts for iPhone, iPad, & Apple Watch
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.