Some of the ones I follow:

- Mr. Money Mustache for financial independence and lifestyle: https://www.mrmoneymustache.com/

- Quastor for large-scale engineering: https://www.quastor.org/

- Krebs for IT security: https://krebsonsecurity.com/

- Lenny's newsletter for product development: https://www.lennysnewsletter.com/

- Psychotactics for marketing: https://www.psychotactics.com/

- CTO craft for CTOs: https://ctocraft.com/

- AI and Machine Learning: https://aiweekly.co/

- Programming news: https://www.programmerweekly.com/

- Startups and tech: https://tldr.tech/

- IT engineering trends: https://www.infoq.com/

- For startup founders: http://www.founderweekly.com/