From the world wide web

Art

Speak White : Je me souviens

Technology

Jason’s Machine Learning 101 : Easy ML introduction
Amazing microcontrollers : Lots of fun for 1$
WiFi routers : Everything you need to know
Advanced Data Structures : A graduate class at MIT
Good bash : Do things safely in bash

People

Joanna Rutkowska : One of the very best
Nikita Voloboev : His wiki is very cool
Dave Touretzky : My lone follower on github

Something else for the garden

Digital gardens : Blogs broke the web
Dichronauts : A world with 2 dimensions of Time and still obeys the laws of physics!