jQuery - The Write Less, Do More, JavaScript Library.
Solaris Sky Calendar - An astronomy calendar right in your pocket
Modernizr - Modernizr is a JavaScript library which is designed to detect HTML5 and CSS3 features in various browsers.
Lumy - Helps you track photographic times
React Native - A framework for building native apps with React
Sundial App - Sun & Moon times and alerts for iPhone, iPad, & Apple Watch