Firefox Monitor - See if you’ve been part of an online data breach.
Have I Been Pwned - Check if your email has been compromised in a data breach.
LKML.ORG - the Linux Kernel Mailing List Archive.
Google Code Search - Search all projects for code or files.
Appscope - directory for Progressive Web Apps (PWAs).
Youglish - Use YouTube to improve your English pronunciation.
txti - Fast web pages for everybody.
testmysite.io - Testmysite.io rates your site based on its initial global load times and its security settings.
Git.io - Official GitHub link shortener.
Sketchysite - You can trust this.
Emojipedia - Emojipedia.
Looper - Endless Entertainment.
Spreadsheet Converter - Things to Make and Do in the Fourth Dimension.
CTF>101 - learn the techniques, thought processes, and methodologies you need to succeed in Capture the Flag competitions.
Quick, Draw - Can a neural network learn to recognize doodling?
Radiooooo - The wonderful musical machine that allows you to travel through space and time!
Wikia/FANDOM Explore - The Fan-trusted Source in Entertainment.
TV Chart - see a graph of any TV show's IMDb ratings, by episode.
Famous Scientists - educational resource focusing on the lives and achievements of the most famous scientists and inventors in history.
Ask HN Threads/
[1% Rule (Internet culture)](https://en.wikipedia.org/wiki/1%25_rule_(Internet_culture))
Things Every Hacker Once Knew by Eric S. Raymond.
Teach Yourself Programming in Ten Years - Peter Norwig
0.30000000000000004.com - Floating Point Math.
Doomsday Algorithm - The Doomsday Algorithm gives the day of the week for any date (and you can do it in your head).
How to speak Silicon Valley: 53 essential tech-bro terms explained - The Guardian.
Practice CTF List - Jordan Wiens.