What security updates should one follow?

I am trying to figure out what RSS feeds, mailing lists, twitter accounts, blogs, etc one should follow to get good updates on security issues and vulnerabilities.

Any framework, language or platform is good.
I am currently following:

• NodeJS Security: https://groups.google.com/forum/#!forum/nodejs-sec
• Wired security: https://www.wired.com//category/security/
• AWS security bulletins(quite a lot and noisy): https://aws.amazon.com/security/security-bulletins/

What are you following, and why?

Maybe we can get a nice list going that helps a bigger audience.