SoloLearn

SoloLearn isn’t just designed for intermediate or advanced code learners, beginners can find lots of useful tips and information about any coding language that they would like to pick up. The application takes you through the very basics of HTML, CSS, JavaScript, Ruby, Python and, of course, C++. You can follow users and check out the codes that they have written recently.
 
The forum is the best place to post questions and get answers from advanced users. Courses are filled with quizzes and follow-up questions, to make sure that you’ve retained all the information. Moreover, challenges are a suitable way to test your skills against other users on the network. The application also lets you find connect with coder friends on Facebook.