Techjunkie made a nice list of the most common temp mails out there:
For reference, there are a lot of platforms to play for free with security preventive tools and techniques as well as vulnerabilities. OWASPs Juice Shop gives lets you play with the Top 10 OWASP risks. PwnAdventure lets you test your skills in hacking games.
CTFd is a Capture The Flag (CTF) framework that guides you in how to set it all up.
And then you have the common cloud platforms, AWS, Azure, Google Cloud, DigitalOcean etc. to easily set up and test security features on easy-to-deploy infrastructures, platforms and/or applications. Have to mention Heroku, a platform for apps, including Juice Shop as just mentioned.
Had fun designing and printing in 3D a house to be built, for someone in the family. It started with me photographing some entrepreneur sketches for the house they are planning to build.
Check the new insider build, outlined by Bleepingcomputer.
In november Microsoft and Adobe was offering a set of security updates. Check how ZeroDay Initiative covers it.
Supporting open source, Cyberpunk/n0where.net, gives both practical tips and news for tools that a cyber security geek would love. And the best part is its rating feature for all published articles. E.g., here I found the SELKS distro.
Check out these categories I found especially interesting:
Designed and printed this Raspberry Pi and 5″ LCD touch panel case for my to-be portable security box. Keywords: Kali, Forensics, mobile, whitehat, stealth
Another “black-hat” site, spyhood, for security practitioners who like to learn from cyber security tools, games and news you can learn from.
The guides are rather trivial (or made trivial:)) with illustrations, step-by-step instructions and screenshots. Just played with the security camera recently.