A 100-day challenge exploring IoT and embedded systems using ESP32, ESP8266, and Raspberry Pi Pico with MicroPython. Each day covers a new sensor or module with complete code, circuit diagram, and explanation.
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Flutter UI Challenges
Flutter UI examples
🧩 Kotlin coding puzzle and solutions
- kotlin
- coding-challenge
- coding-interviews
- programming-exercises
A public release of the Steal My Bitcoin challenge
Flutter UI challenge (with Box2D physic)- Smart washing machine app
- ui
- challenge
- ui-challenge
- flutter-apps
Census Reporter is a Knight News Challenge-funded project to make it easier for journalists to write stories using information from the U.S. Census bureau.
Implement one small API on SQLite in any language; we benchmark it on a $12 server (1 vCPU, 2 GB)
Cloudflare turnstile and challenge page solver in Rust (full reverse, request based)
Flutter Credit Card Input form
- flutter
- flutter-apps
- flutter-examples
- card-companies
Tool to export Juice Shop challenges and hints in data format compatible with CTFd, RootTheBox or FBCTF
- owasp
- ctf
- ctfd
- application-security
McDonald's China MCP innovation skill - entry for MCD Developer Innovation Challenge 2026 (1024 Programmers' Day)
The most comprehensive Hack The Box writeup collection - 500+ machines, 400+ challenges, interactive knowledge graph, skill trees, attack path diagrams, ProLabs, Sherlocks, OSCP/CPTS/CRTO prep. Browse: momenbasel.github.io/htb-writeups
- active-directory
- cheatsheet
- ctf
- cybersecurity
Neuro-symbolic agents with verified memory. MCP math tools, an algebra repair Skill, and an open challenge. Verify solutions, learn checked rules, and reuse.
- ai-agents
- mathematics
- neuro-symbolic
- reasoning
Things we learned from Capture The Flag hacking competitions we participated in.
- hacking-competitions
- ctf-writeups
- ctf
- challenges
Student submissions for the WWDC 2020 - Swift Student Challenge
- swift
- ios
- apple
- swift-playgrounds
Cell tracking and segmentation software
- cell-segmentation
- cell-tracking
- cell-tracking-challenge
- gurobi
Student submissions for the WWDC 2021 - Swift Student Challenge
- swift
- ios
- apple
- swift-playgrounds
Student submissions for the WWDC 2022 - Swift Student Challenge
- swift-student-challenge
- wwdcscholars
- apple
- swift-playgrounds
Parse NTLM challenge messages over HTTP and SMB
- reconnaissance
- information-gathering
- ntlm-authentication-protocol
Learn the DSA and be Interview ready
- dsa
- java
- coding-challenges
- data-structures-and-algorithms
A Macau food recommendation Agent built on Thompson Sampling + StackedPareto weight fusion, with a full evaluation pipeline (5-fold CV, bootstrap CIs, stress tests) on 5,000 simulated users and 100k interactions. Competition entry for the QwenPaw AI Developer Challenge.
A flexible playground for Android CTF challenges.
- android
- ctf
- cybersecurity
- playground
A CTF framework to create, build, deploy and monitor challenges
- ctf-tools
- ctf-framework