jQuery Mobile is a HTML5-based user interface system designed to make responsive web sites and apps that are accessible on all smartphone, tablet and desktop devices.
PhoneGap and Apache Cordova are free and open source framework that allows you to create mobile apps using standardized web APIs for the platforms you care about. Easily create apps using the web technologies you know and love: HTML, CSS, and JavaScript. Mobile apps with HTML, CSS & JS Target multiple platforms with one code base. But burden is that developers must test/get feedback/maintain several platforms.
Codiqa is a powerful drag-and-drop builder for creating cross-platform mobile apps and websites. It's simple, easy to use.
Grocerycrud is used to create a simple, stable and secure backoffice system. An open-source CRUD implementation for the CodeIgniter PHP framework
Angular (https://angular.io/) for web, mobile web, native mobile and native desktop.
Angular (https://angular.io/) for web, mobile web, native mobile and native desktop.