Resources

Links to certain resources I've used over the years.
In particular, I can vouch for these resources's efficiency.
This article will be updated regularly.

Programming Languages

Python

Haskell

Haskell style guide

C

Null pointers in C: Link 1, Link 2

C++

The Cherno's YouTube channel
Quick, informative explanations on C++ features like auto, smart pointers, #define, etc.
Useful for programmers learning C++.

HTML/CSS/JavaScript

30-minute crash course in front-end development
Microsoft's 30-minute crash course in HTML, CSS, and JavaScript.
One-month crash course in front-end development
Mozilla's guide to front-end development.
Node, Express & MongoDB: Button click example
Make your first Node.js app with MongoDB.
Currying and Function Composition in JS
Useful tips for currying and debugging function compositions in JavaScript.

L^aT_eX

Not so short introduction to L^aT_eX
If you've always fought against L^aT_eX instead of embracing it, this article's for you.

Computer Science

Machine Learning

Introducion to Machine Learning
Andrew Ng's famous Machine Learning course.
Great course to learn your way up from regression and understand the math behind it, especially thanks to programming in MATLAB.
Unit-testing ML code

Deep Learning

Obviously deep learning is a subset of machine learning, but I've separated here since they may attract different audiences.

Deep Learning With Python
Learn how to use Keras from the author of the library. If you're a beginner, you'll be able to do some cool projects and get a taste of deep learning. If you're an experienced machine learning programmer, you'll be able to learn how to effectively create your own models.

Automata Theory

Neso Academy
Good lightweight material to get a brief understanding of regular languages, pushdown automata, turing machines, etc.

Operating Systems

Operating Systems: Three Easy Pieces
Supremely readable OS textbook with homeworks & solutions. The best self-study textbook I've seen for any subject thus far.

Linear Temporal Logic

Very specific to formal methods.

Joost-Pieter Katoen's Lectures on YouTube
Super clear lectures from a leading researcher.

Software Engineering

Tips

Software Engineering Advice
Deep Learning library Keras author François Chollet talks about software engineering.

Text Editing

Seven habits of effective text editing
Learn to improve text editing efficiency from the author of vim

Research

How to do research

How to Read a Paper
Simple guidelines on how to read a research paper.
How to Write a Great Research Paper
Tips from Simon Peyton Jones (SPJ), a PL giant. Funny, and also very informative, giving you a new perspective on how to do research.
How to Give a Great Research Talk
Another great resource by SPJ. In a recursive manner, embodies the talk in his own talk!