Programming

Events

post-mortems
List of post-mortems
Programming Talks
Awesome & Interesting Talks concerning Programming

Open education

Coding Interview University
Complete computer science study plan to become a software engineer
freeCodeCamp
Community that helps you learn to code, then get experience by contributing to open source projects used by nonprofits
Low-Level Programming University
How to be low-level programmer
Open Source Society University
Path to a self-taught education in Computer Science!
The System Design Primer
Learn how to design large-scale systems. Prep for the system design interview

Resources

free-programming-books
List of Free Learning Resources
Hyperpolyglot
Commonly used features in a side-by-side format

Front-end

Can I Use
Provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers
Web Accessibility Initiative (WAI)
Develops strategies, guidelines, and resources to help make the Web accessible to people with disabilities

Materials

Big List of Naughty Strings
List of strings which have a high probability of causing issues when used as user-input data
Public APIs
Collective list of public JSON APIs for use in web development