10 GitHub repos with 560k+ combined stars that could save vibe coders $15,000+/year in SaaS bills

freeCodeCamp 440k+ — thousands of free courses, projects, and certifications. A serious alternative to paying for another coding subscription. https://github.com/freeCodeCamp/freeCodeCamp…

awesome-selfhosted 250k+ — one massive directory of self-hosted alternatives for everything from analytics to project management. https://github.com/awesome-selfhosted/awesome-selfhosted…

AppFlowy 65k+ — open-source Notion alternative for notes, docs, databases, and project management without another monthly subscription. https://github.com/AppFlowy-IO/AppFlowy…

Plane 40k+ — open-source project management platform built as an alternative to tools like Jira, Linear, and Asana. https://github.com/makeplane/plane

Twenty 40k+ — open-source CRM that gives you contacts, pipelines, tasks, and customer management without expensive per-seat pricing. https://github.com/twentyhq/twenty

http://Cal.com 38k+ — open-source scheduling infrastructure. Build your own Calendly-style booking system instead of paying for every additional user. https://github.com/calcom/cal.com

Directus 31k+ — turns databases into APIs and admin interfaces. Perfect when your vibe-coded app needs a backend without building everything from scratch. https://github.com/directus/directus…

Plausible Analytics 22k+ — lightweight, privacy-friendly analytics that can replace bloated analytics subscriptions for many websites. https://github.com/plausible/analytics…

Dify 120k+ — build AI apps, agents, RAG workflows, and LLM-powered tools with an open-source platform instead of stitching together multiple paid services. https://github.com/langgenius/dify

n8n 130k+ — powerful workflow automation that lets you self-host integrations, AI agents, and business automations instead of paying for every task. https://github.com/n8n-io/n8n

The best part?

Most of these aren’t just “free alternatives.”

You can self-host them, customize them, connect them to your AI coding workflow, and actually own the stack.

Save this before adding another $49/month SaaS tool to your credit card.

freeCodeCamp/freeCodeCamp

Source: https://github.com/freeCodeCamp/freeCodeCamp

freeCodeCamp.org’s open-source codebase and curriculum

freeCodeCamp.org is a friendly community where you can learn to code for free. It is run by a donor-supported 501(c)(3) charity to help millions of busy adults transition into tech. Our community has already helped more than 100,000 people get their first developer job.

Our full-stack web development and machine learning curriculum is completely free and self-paced. We have thousands of interactive coding challenges to help you expand your skills.

Table of Contents

• Certifications
• The Learning Platform
• Reporting Bugs and Issues
• Reporting Security Issues and Responsible Disclosure
• Contributing
• License

Certifications

freeCodeCamp.org offers several free developer certifications that make up the Full-Stack Developer Curriculum:

• Responsive Web Design
• JavaScript
• Front-End Development Libraries
• Python
• Relational Databases
• Back-End Development and APIs

Each of these certifications involves completing interactive lessons, workshops, labs, reviews, and quizzes. Throughout the certification, you’ll need to complete 5 required projects to qualify for the exam. Once you pass the exam, then you can claim the certification.

freeCodeCamp.org also offers free language certifications designed around internationally recognized proficiency levels:

• A2 English for Developers (Beta)
• B1 English for Developers (Beta)
• A1 Professional Spanish (Beta)
• A1 Professional Chinese (Beta)

Each of these certifications is organized into modules, with sections for warm-ups, lessons, practice exercises, review pages, and quizzes to ensure you fully grasp the material before progressing to the next module. You’ll need to complete all of the quizzes in order to qualify for the exam at the end of the certification.

Once you’ve earned a certification, you will always have it. You will always be able to link to it from your LinkedIn or resume. And when your prospective employers or freelance clients click that link, they’ll see a verified certification specific to you.

The one exception to this is if we discover violations of our Academic Honesty Policy. When we catch people unambiguously plagiarizing (submitting other people’s code or projects as their own without citation), we do what all rigorous institutions of learning should do - we revoke their certifications and ban those people.

In addition, to help prepare for job interviews, freeCodeCamp.org includes The Odin Project (freeCodeCamp Remix), Coding Interview Prep, Project Euler, and Rosetta Code.

A free, professional Foundational C# with Microsoft Certification is also available.

The Learning Platform

This code is running live at freeCodeCamp.org.

Our community also has:

• A forum where you can usually get programming help or project feedback within hours.
• A YouTube channel with free courses on Python, SQL, Android, and a wide variety of other technologies.
• A technical publication with thousands of programming tutorials and articles about mathematics and computer science.
• A Discord server where you can hang out and talk with developers and people who are learning to code.

Join the community here.

Reporting Bugs and Issues

If you think you’ve found a bug, first read the how to report a bug article and follow its instructions.

If you’re confident it’s a new bug and have confirmed that someone else is facing the same issue, go ahead and create a new GitHub issue. Be sure to include as much information as possible so we can reproduce the bug.

Reporting Security Issues and Responsible Disclosure

We appreciate responsible disclosure of vulnerabilities that might impact the integrity of our platforms and users.

Read our security policy and follow these steps to report a vulnerability.

Contributing

The freeCodeCamp.org community is possible thanks to thousands of kind volunteers like you. We welcome all contributions to the community and are excited to welcome you aboard.

Please follow these steps to contribute.

Recent Contributions:

License

Copyright © 2014 freeCodeCamp.org

The content of this repository is bound by the following licenses:

• The computer software is licensed under the BSD-3-Clause license.
• The learning resources in the /curriculum directory including their subdirectories therein are copyright © 2014 freeCodeCamp.org