Py is described as 'teaches you all about programming and development through over 1000+ free, byte-sized lessons in everything' and is an app in the Education & Reference category. There are more than 25 alternatives to Py for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Android Tablet. The best alternative is freeCodeCamp, which is both free and Open Source. Other great apps like Py are Codecademy (Freemium), SoloLearn (Freemium), tutorialspoint (Free) and Code.org (Free).
Code.org is a non-profit whose goal is to expose all students to computer programming. We believe that computer programming is a liberal art; it's something EVERY student in the world should be exposed to at some point in their childhood education.
The Odin Project is one of those "What I wish I had when I was learning" resources. Not everyone has access to a computer science education or the funds to attend an intensive coding school and neither of those is right for everyone anyway.
Tuts+ teaches creative and technical skills to millions of people worldwide. Tuts+ teaches tutorials, courses, articles, eBooks, news and community for topics such as design, development, photography, audio, video, computing, and craft.