1. Solo learn
2. Programming hub: learn to code
3. Udemy
4. Coursera
5. Freecodecamp
6. Geekforgeek
7. Coding ninjas studio
8. W3school

        You might know some programming site or apps but these above apps are very useful for basic understanding and to develop programming skills. 

Solo learn

        In this app you will find programming module in such a way that you can practice it side by side with such wonderful designing method to practice. you will find some community there which practice and post the program. you can play some test live with others in gaming way.

Programming hub: learn to code

        It is for the beginner purpose to learn new programming language. different programming module are there once one downloaded and you can use it offline. one feature is best is that tap and lean. Once tap on screen and next line present read it and tap and again next line present to understand. Audio speech also available while Side by Side line presented on screen.

 Udemy

        Udemy is a wonderful platform for learner programmer. Udemy provide video tutorial lecture of different programming languages and for other different skills. That tutorial will be available with some economical price value.

Tips : you can find out some Udemy lectures on internet free of cost with condition of searching particular course name on google and try to download somewhere at free of cost. 

 Coursera

        Coursera is same as above  Udemy. but different teacher and tutorial . 

Freecodecamp 

        Developed by the organization or community which make it free to learn programming.

Geekforgeek 

     Different programming language with detailed explanation are there. Learn & practice different exercise.

 Coding ninjas studio: 

        Learn like a professional . Its premium but some of module free to learn and practice.

 W3school 

         Famous and old site to start with front end development  like html, CSS, JavaScript etc.