Python : Python for Everybody Specialization : https://www.coursera.org/specializations/python
Python : Crash Course on Python : https://www.coursera.org/learn/python-crash-course
HTML, CSS, Javascript : HTML, CSS and Javascript for Web Developers : https://www.coursera.org/learn/html-css-javascript-for-web-developers
Android with Java : Android Basics-User Interface : https://www.udacity.com/course/android-basics-user-interface--ud834
Android with Java : Android Basics-User Input : https://www.udacity.com/course/android-basics-user-input--ud836
Android with Java : Android Basics-Multiscreen Apps : https://www.udacity.com/course/android-basics-multiscreen-apps--ud839
Android with Java : Android Basics-Networking : https://www.udacity.com/course/android-basics-networking--ud843
Android with Java : Android Basics-Data Storage : https://www.udacity.com/course/android-basics-data-storage--ud845