1) WEB
(1) Back End - PHP: Laravel, Codeigniter, CakePhp, Symfony frameworks - Node.js, Express - Python: Django, Flask frameworks
(2) Front End - Html, HTML5, CSS, CSS3, SCSS, Javascript - JavaScript frameworks: React.js, Angular 2+, Vue.js - MERN, MEAN, MEVN
2) Mobile App - Native Mobile app development: Android studio (java, kotlin), Xcode (objective c, swift) - Hybrid app development: React Native, Ionic framework, Flutter