Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
AppConvertly.com - AppConvertly - convert your website to Android & iOS app. No coding required. Easy solution to reach new audience in 5 minutes https://www.appconvertly.com/
Sencha Touch - The leading mobile web app framework based on HTML5 for amazing mobile apps.
Median.co - Median.co (formerly GoNative.io) is the industry leading solution used to build iOS and Android webview apps. Get started for free and turn any website into a full-feature mobile app in seconds.
App Press - App Press provides tools to create and publish apps for iOS and Android.
Website 2 APK Builder - Convert your HTML, CSS, JS and all other web content into an Android App within seconds.