jQuery - The Write Less, Do More, JavaScript Library.
MyEtherWallet - MyEtherWallet is a free, open-source, client-side interface.
React Native - A framework for building native apps with React
Exodus.io - All-in-one app to secure, manage and exchange blockchain assets.
Babel - Babel is a compiler for writing next generation JavaScript.
Toshi - A browser for the Ethereum network