nylas

N1 has its code published on GitHub with a very active community & works natively on Mac OS, Windows & Linux. It’s built on JavaScript, leveraging some of the most powerful of the latest Web technologies like ES6 & HTML5, but doesn’t take a performance hit by depending on a browser. Instead, it uses Atom & Electron, which sit atop­ NodeJS & Chromium, & then adds React & Flux, to scale up N1’s possibilities, giving it native-level performance.