Bloc.io is described as 'You'll be building real web applications, learning with other students, and receiving one-on-one attention from the mentors. We'll be pushing you to the very edge of your learning capacity. You will feel like quitting at times' and is an website in the Development category. There are more than 25 alternatives to Bloc.io, not only websites but also apps for a variety of platforms, including Android, iPhone, Mac and Windows. The best alternative is freeCodeCamp, which is both free and Open Source. Other great sites and apps similar to Bloc.io are Codecademy (Freemium), Code.org (Free), Treehouse (Paid) and Grasshopper (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.
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.
Coderbyte is a place built for anyone to practice and perfect their programming skills. Challenges are added almost every day so you can work on applying your algorithmic thought process on any problem you want at anytime.