"Every great developer you know got there by solving problems they were unqualified to solve until they actually did it." —Patrick McKenzie
What is Code? by Paul Ford
Programming Language Theory - a path to enlightenment for programming practitioners who didn’t learn it at school.
GitHut - visualize and explore the complexity of the universe of programming languages used across the repositories hosted on GitHub.
Mastering Programming by Kent Beck
Teach Yourself Computer Science - give yourself a world-class CS education without investing years and a small fortune in a degree program.
Awesome Cold Showers - a list of cold showers on overhyped topics.
arl - lists of most popular repositories for most favoured programming languages (according to StackOverflow).
Good books for deep hacks by Joe Nelson, a list of books for a deep dive into interesting technical topics.