#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
CubeSatSim alternatives for AI agents.
Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.
Current skill
CubeSatSim
CubeSatSim, the AMSAT CubeSat Simulator
83
Quality
80
Trust
404
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
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$ npx skills add TheAlgorithms/Python#4
Coding articles to level up your development skills
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$ npx skills add Chalarangelo/30-seconds-of-code#5
24 Lessons, 12 Weeks, Get Started as a Web Developer
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$ 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.
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$ 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
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#12
An Open Source implementation of Notebook LM with more flexibility and features
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$ npx skills add lfnovo/open-notebook#13
High-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios
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$ npx skills add taosdata/TDengine#14
Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at
24K starsJun 16, 2026 pushautomationCAutomation
$ npx skills add arendst/Tasmota#15
GoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through your browser.
21K starsAug 5, 2026 pushdata-analysisCData Analysis
$ npx skills add allinurl/goaccess#16
A time-series database for high-performance real-time analytics packaged as a Postgres extension
23K starsJun 20, 2026 pushdata-analysisCSQL
$ npx skills add timescale/timescaledbHow 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 CubeSatSim 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.