Atomic Learning is described as 'offers a cost-effective just-in-time professional development, technology integration and support solution that empowers educators to effectively utilize technology to positively impact student achievement' and is a online education service in the education & reference category. There are more than 50 alternatives to Atomic Learning, not only websites but also apps for Android, iPhone, Android Tablet and iPad. The best alternative is freeCodeCamp, which is both free and Open Source. Other great sites and apps similar to Atomic Learning are Codecademy, Udemy, SoloLearn and W3Schools.
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.