Machine/Deep Learning, AI, etc.

• Distill
• The Gradient
• The Learning Machine
• Neural Networks and Deep Learning by Michael Nielsen
• Machine Learning Mastery

Computer Security, Privacy, Hacking, etc.

• cryptopals
• microcorruption
• Useful Cryptography Resources
• hacksplaining

Programming

• You Don't Know JS
• Project Euler
• Rosalind

Learning Math

• The Matrix Cookbook
• 3blue1brown
• Numberphile

Blogs, Grad School, Miscellaneous

• Peter Bloem Blog
• Counterintuitive Facts
• Smerity Personal Site
• Grad Job Guide
• Readings For Grad Students
• Hutter Prize
• Steven Lott blog