2 Mimo If you want to pick up SQL, Python, or web development, Mimo is a good choice. The well-designed app explains key concepts with easy-to-understand coursework and examples.

Python could soon be the most popular programming language, battling it out for top spot with JavaScript, Java and C, depending on which language ranking you look at.

If terms like SQL, Python and JavaScript aren’t on your radar, employers may not be interested in hiring you. Roughly half of the jobs in the top income quartile — defined as those paying ...