jQuery - The Write Less, Do More, JavaScript Library.
Apache Tiles - Apache Tiles is an open-sourced templating framework for modern Java applications.
React Native - A framework for building native apps with React
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Babel - Babel is a compiler for writing next generation JavaScript.
mustache - Mustache is a simple web template system with implementations available for ActionScript, C++...