Appcelerator Titanium - Appcelerator Open Source
Ionic - Ionic is a cross-platform mobile development stack for building performant apps on all platforms with open web technologies.
B4X - Cross platform development tools for native iOS, Android, desktop and server applications.
Apache Cordova - Platform for building native mobile applications using HTML, CSS and JavaScript
NativeScript - Build truly native apps with JavaScript
Sencha Touch - The leading mobile web app framework based on HTML5 for amazing mobile apps.