Hack Arena

Capture the Flag

Hack Arena launched on April 12, 2025 with 7 votes.

What it does

Cybersecurity Competitions, Capture the Flag

Google Capture the Flag 20172017 · ▲152
Google's 2nd annual worldwide security competition
The Secure Developer - Ep. #6, Developer War Games: Capture The Flag!2017 · ▲70
Security for developers, covering tools and best practices.
HacktivateOct 2025 · apps.apple.com · ▲139
A capture-the-flag game teaching real cybersecurity skills
MM
March Madness for Hackers2014 · codersbracket.com · ▲100
Hacker Experience2014 · ▲96
Online hacking simulation game
CH
Code.hackmit.org – Software for Hackathons2016 · code.hackmit.org · ▲140

TL
The load-bearing vocabulary of Claude▲710
Life & fun · 16d ago · louisabraham.github.io
WI
What if the speed of light was 5 km/h?▲600
Special relativity simulator in which light crawls along at a human speed, so Lorentz contraction, aberration and Doppler shift happen at walking pace.
Life & fun · 2d ago · rivendell.dmitrybrant.com
Articos▲398
Launch with confidence, not gut instinct
Life & fun · 17d ago · articos.com
The same nine streaming subscriptions cost $702/year more than in 2021▲382
9 major streaming services cost $95.91/mo in 2021-03 and $154.41/mo today — up 61%, or $702 a year. Every change sourced.
Life & fun · 2d ago · honestlyranked.com
Nex▲363
Claude Cowork for high-volume GTM workflows
Life & fun · 9d ago · nex.ai
Notify.domains▲321
Know the moment a domain opportunity appears
Life & fun · 14d ago · notify.domains

IB
I built a hardware processor that runs Python▲983
Hi everyone, I built PyXL — a hardware processor that executes a custom assembly generated from Python programs, without using a traditional interpreter or virtual machine. It compiles Python -> CPython Bytecode -> Instruction set designed for direct hardware execution. I’m sharing an early benchmark: a GPIO test where PyXL achieves a 480ns round-trip toggle — compared to 14-25 micro seconds on a MicroPython Pyboard - even though PyXL runs at a lower clock (100MHz vs. 168MHz). The design is stack-based, fully pipelined, and preserves Python's dynamic typing without static type restrictions.…
Dev tools · 2025 · runpyxl.com
UC
Unsure Calculator – back-of-a-napkin probabilistic calculator▲930
Life & fun · 2025 · filiph.github.io
IB
I built an AI that turns GitHub codebases into easy tutorials▲923
https://the-pocket.github.io/Tutorial-Codebase-Knowledge/
AI · 2025 · github.com
Whatting▲898
The iPad diary, just for you
Work · 2025 · whatting.com
Strawberry▲859
AI browser that saves you 18h/week
AI · 2025 · strawberrybrowser.com
Peek▲828
AI personal finance coach that guides you through decisions
Work · 2025 · peek.money