UI 部件 & 组件工具 桌面 & 移动: Kendo UI [free to $] Webix [$] Semantic UI Metro UI Bootstrap Materialize Material UI Polymer Paper Elements 桌面 (NW.js 和 Electron): photonkit React UI Components for OS X El Capitan and Windows 10 专注移动: Ratchet Kendo UI Mobile Mobile Angular UI Framework7