#1
freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.
448K starsJun 16, 2026 pusheducationTypeScriptEducation
$ npx skills add freeCodeCamp/freeCodeCampAlternatives
Hacker101 alternatives for AI agents.
Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.
Current skill
Hacker101
Source code for Hacker101.com - a free online web and mobile security class.
79
Quality
81
Trust
14K
Stars
#2
:books: Freely available programming books
390K starsJun 13, 2026 pusheducationPythonEducation
$ npx skills add EbookFoundation/free-programming-books#3
All Algorithms implemented in Python
222K starsJun 1, 2026 pusheducationPythonEducation
$ npx skills add TheAlgorithms/Python#4
Coding articles to level up your development skills
128K starsJun 16, 2026 pusheducationJavaScriptEducation
$ npx skills add Chalarangelo/30-seconds-of-code#5
24 Lessons, 12 Weeks, Get Started as a Web Developer
96K starsJun 14, 2026 pusheducationJavaScriptEducation
$ npx skills add microsoft/Web-Dev-For-Beginners#6
《Hello 算法》：动画图解、一键运行的数据结构与算法教程。支持简中、繁中、English、日本語，提供 Python, Java, C++, C, C#, JS, Go, Swift, Rust, Ruby, Kotlin, TS, Dart 等代码实现
127K starsApr 18, 2026 pusheducationJavaEducation
$ npx skills add krahets/hello-algo#7
AnkiDroid: Anki flashcards on Android. Your secret trick to achieve superhuman information retention.
12K starsAug 23, 2026 pusheducationKotlinEducation
$ npx skills add ankidroid/Anki-Android#8
A book series (2 published editions) on the JS language.
185K starsFeb 15, 2026 pusheducationEducation
$ npx skills add getify/You-Dont-Know-JS#9
Code. Music. Live.
12K starsJun 12, 2026 pusheducationC++Education
$ npx skills add sonic-pi-net/sonic-pi#10
p5.js is a client-side JS platform that empowers artists, designers, students, and anyone to learn to code and express themselves creatively on the web. It is based on the core principles of Processing. Looking for p5.js 2.0? http://beta.p5js.org
24K starsJun 14, 2026 pushdesign-creativeJavaScriptCreative Coding
$ npx skills add processing/p5.js#11
The recursive internet scanner for hackers. 🧡
9.9K starsJun 12, 2026 pushsecurityPythonOSINT
$ npx skills add blacklanternsecurity/bbot#12
AI-powered bug bounty hunting from your terminal - recon, 20 vuln classes, autonomous hunting, and report generation. All inside Claude Code.
3.5K starsJun 18, 2026 pushsecurityPythonSecurity
$ npx skills add shuvonsec/claude-bug-bounty#13
Nuclei is a fast, customizable vulnerability scanner powered by the global security community and built on a simple YAML-based DSL, enabling collaboration to tackle trending vulnerabilities on the internet. It helps you find vulnerabilities in your applications, APIs, networks, DNS, and cloud configurations.
29K starsJun 13, 2026 pushsecurityGoSecurity
$ npx skills add projectdiscovery/nuclei#14
12 weeks, 26 lessons, 52 quizzes, classic Machine Learning for all
87K starsJun 9, 2026 pushml-automationJupyter NotebookMachine Learning
$ npx skills add microsoft/ML-For-Beginners#15
🕵️♂️ All-in-one OSINT tool for analysing any website
34K starsJun 15, 2026 pushlegal-complianceTypeScriptPrivacy
$ npx skills add lissy93/web-check#16
An Open Source implementation of Notebook LM with more flexibility and features
32K starsJun 18, 2026 pushdata-analysisTypeScriptNotebook
$ npx skills add lfnovo/open-notebookHow to choose
When should you switch?
Use an alternative when it has a clearer install path, higher trust score, fresher maintenance, or better platform fit for your current agent stack. Keep Hacker101 if it already passes your workflow test and repository review.
Next step
Compare top candidates side by side
Open the compare page, test the install commands in a sandbox, and check each repository before using a skill in production.