Here is some stuff on the internet I like:
Daniel Lemire's blog How to write stupidly fast code and more
Embedded in Academia Compiler construction, program optimization and tools
NSBlog Deep dive into the implementation of the Objective-C language
NSHipster Greate ressource on iOS Development
Swift by Sundell All about Swift
The Paradox Thoughts about container infrastructures and building services
Low Level Bits Insights into low level programming and developer tools
Computational Photography From Selfies to Black Holes Amazing article about the future of photography