VisualSitemaps - Autogenerate visual sitemaps in seconds.
The Design of Everyday Things - A timeless book, The Design of Everyday Things explores the fundamentalprinciples behind all design, and how to understand the psychology behind how we use things, and why they frustrate us.
Codrops Blueprints - Free website concepts ready to implement or modify
CS50x - HarvardX (edX) - An introduction to the intellectual enterprises of computer science and the art of programming.
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
Coursera - "Compilers" by Stanford - The course explores how high-level languages are compiled to low-level assembly.