The writing, good; the categorization, somewhat arbitrary.

Big ideas

• worrydream.com Bret Victor

Software, Engineering Thinking

• eli.thegreenplace.net Eli Bendersky

• blog.nullspace.io Alex Clemmer

• manybutfinite.com Gustavo Duarte

• jvns.ca Julia Evans

• jessitron.com Jessica Kerr

• yosefk.com Yossi Kreinin

• rachelbythebay.com Rachel Kroll

• nayuki.io Nayuki

• evanjones.ca Evan Jones

• danluu.com Dan Luu

• joelonsoftware.com Joel Spolsky

• forrestthewoods.com Forrest Smith

Math/Stats/AI/Imaging/Cryptography

• michaelfogleman.com - Michael Fogelman

• allendowney.com/blog Allen Downey

• jeremykun.com Jeremy Kun

• colah.github.io Christopher Olah

Low level

• bellard.org Fabrice Bellard

• devblogs.microsoft.com/oldnewthing Raymond Chen

• mrale.ph Vyacheslav Egorov

• chrisfenton.com Chris Fenton

• jessfraz.com Jessie Frazelle

• realworldtech.com David Kanter

• lemire.me Daniel Lemire

• kamalmarhubi.com Kamal Marhubi

• windytan.com Oona Räisänen

• blog.regehr.org John Regehr

• snellman.net Juho Snellman

• psy-lob-saw.blogspot.com Nitsan Wakart

Distributed

• brooker.co.za Marc Brooker

• aphyr.com Kyle Kingsbury

Security

• popcount.org Marek Majkowski

Hardware/DIY Hacking

• qqrs.us Russell Smith

Science/Medicine/Economics

• nintil.com Artir

• marginalrevolution.com Tyler Cowen and friends

• judithcurry.com Judith Curry

• slatestarcodex.com Alexander Scott

And finally, this list of hot stoves just warms my heart: Mistakes You Apparently Just Have to Make Yourself - Dan McKinley