Top 15+ Open Source Project Repositories on GitHub to Explore in 2025

Are you looking to level up your development skills and make an impact in the tech world? GitHub, the leading platform for open-source collaboration, connects developers from around the globe to build, share, and innovate. With over 100 million users, it hosts countless projects that shape everything from software tools to machine learning models.

Exploring open source repositories on GitHub offers you hands-on experience, access to the latest technology, and the chance to contribute to impactful projects. You can learn from real-world code, expand your expertise, and collaborate with a community of developers.

In 2025, these projects are more crucial than ever. They offer opportunities to stay ahead of the curve, refine your skills, and engage with a global network. Whether you're learning, contributing, or building something new, GitHub’s open-source repositories are an invaluable resource for developers like you.

Let’s dive into how GitHub’s open-source repositories can boost your development journey.

Top 12 GitHub Open Source Projects Repositories of 2025

Here’s a list of the top 12 open source repositories on GitHub for 2025. These star-rated repositories are highly impactful, innovative, and widely used. Each offers a chance to contribute, learn, and explore new technologies. Let’s dive in!

1. freeCodeCamp

freeCodeCamp is an open-source platform offering coding tutorials and projects to help developers of all levels build a career in web development.

Key Features:

• Offers thousands of coding lessons and challenges
• Provides certifications upon completing various coding modules
• Interactive, hands-on learning experience

 Skills Gained:

• Web development (HTML, CSS, JavaScript, Node.js)
• Full-stack development
• Problem-solving skills

Tools and Tech:

• JavaScript
• React
• Node.js

 Applications:

• Learn coding at your own pace
• Contribute to a thriving community of learners

2. VS Code

Visual Studio Code (VS Code) is a powerful code editor with robust features like debugging, Git integration, and extensions that make it a popular choice for developers.

Key Features:

• IntelliSense (auto-completion and code suggestions)
• Integrated debugging and Git version control
• Vast extension marketplace

Skills Gained:

• Code editor optimization
• Plugin development
• Web development

Tools and Tech:

• TypeScript
• JavaScript
• Electron

 Applications:

• Development tool customization
• Creating extensions for VS Code

Also Read: How to Use GitHub? Step-by-Step GitHub Tutorial for Beginners

3. Azure Docs

Azure Docs is the official documentation repository for Microsoft Azure, offering detailed guides, tutorials, and resources for cloud computing and infrastructure services.

Key Features:

• Cloud architecture and service documentation
• Easy-to-follow tutorials
• Regular updates from Microsoft experts

Skills Gained:

• Cloud infrastructure management
• Microsoft Azure services
• Writing and contributing to documentation

Tools and Tech:

• Markdown
• Azure CLI

Applications:

• Cloud solutions development
• Contributing to open-source documentation

4. Flutter

Flutter is a UI toolkit for building natively compiled applications. They are made using a single codebase.

Key Features:

• Fast development cycle with Hot Reload
• Rich set of pre-built widgets
• Cross-platform compatibility

Skills Gained:

• Mobile app development
• Cross-platform UI design
• Dart programming

Tools and Tech:

• Dart
• Flutter SDK

Applications:

• Developing mobile, web, and desktop apps
• Building user interfaces with customizable widgets

5. First Contributors

First Contributors is one of the highly aclaimed open source repositories on GitHub designed to help new open-source contributors make their first pull request. It simplifies the process of contributing to open-source projects.

Key Features:

• Step-by-step guide to making a pull request
• Focus on beginner-friendly contributions
• Clear and simple instructions

Skills Gained:

• Open-source contribution process
• Git and GitHub workflow
• Collaboration and teamwork

Tools and Tech:

• Git
• GitHub

Applications:

• Learning how to contribute to open-source projects
• Community Collaboration

Also Read: GitHub vs GitLab: Difference Between GitHub and GitLab

6. TensorFlow

TensorFlow is an open-source library for machine learning and artificial intelligence, widely used for training and deploying models.

Key Features:

• Powerful API for building neural networks
• Support for deep learning models
• Flexible for research and production environments

Skills Gained:

• Machine learning and AI
• Deep learning techniques
• TensorFlow framework

Tools and Tech:

• Python
• TensorFlow

Applications:

• Building AI and machine learning models
• Developing predictive analytics systems

7. React-Native

React-Native allows developers to build mobile applications using JavaScript and React, providing a native performance experience.

Key Features:

• Single codebase for Android and iOS apps
• Native modules and components
• Fast refresh for rapid iteration

Skills Gained:

• Mobile app development
• React and JavaScript
• Cross-platform development

Tools and Tech:

• React
• JavaScript
• React-Native CLI

Applications:

• Building mobile apps for both iOS and Android
• Developing responsive UI components

8. Kubernetes (K8s)

Kubernetes is an open-source container orchestration platform for automating the deployment, scaling, and management of containerized applications.

Key Features:

• Automated container management
• Scalable architecture
• Self-healing and load-balancing

Skills Gained:

• Containerization
• Kubernetes architecture
• Cloud-native applications

Tools and Tech:

• Kubernetes
• Docker

Applications:

• Managing cloud-native applications
• Automating deployment workflows

Also Read: Kubernetes Vs. Docker: Primary Differences You Should Know

9. DefinitelyTyped

DefinitelyTyped is a community-driven repository providing TypeScript definitions for popular JavaScript libraries.

Key Features:

• TypeScript definition files for JavaScript libraries
• Regularly updated by the community
• Easy integration with TypeScript projects

Skills Gained:

• TypeScript development
• Contributing to community-driven projects
• JavaScript library integration

Tools and Tech:

• TypeScript
• JavaScript

Applications:

• Improving TypeScript compatibility in JavaScript projects
• Contributing to open-source TypeScript projects

10. Ansible

Ansible is an open-source automation tool for IT tasks such as configuration management, application deployment, and orchestration.

Key Features:

• Agentless architecture
• Simple YAML-based configuration
• Scalable infrastructure automation

Skills Gained:

• Infrastructure automation
• DevOps practices
• Configuration management

Tools and Tech:

• Ansible
• YAML

Applications:

• Automating system administration tasks
• Managing infrastructure as code

11. Docusaurus

Docusaurus is a project used to build, deploy, and maintain open-source documentation websites quickly and easily.

Key Features:

• React-based static site generator
• Built-in support for versioned documentation
• Easy to customize themes

Skills Gained:

• Documentation website development
• React and static site generation
• Open-source contribution

Tools and Tech:

• React
• Markdown

Applications:

• Building open-source documentation sites
• Creating versioned documentation for projects

12. Homebrew

A package manager that is used for both macOS and Linux. It simplifies the installation and management of software.

Key Features:

• Simplifies installation of command-line tools
• Strong community and vast repository of formulas
• Easy updates and version management

Skills Gained:

• Package management
• Software installation automation
• System Administration

Tools and Tech:

• Ruby
• Bash

Applications:

• Managing system packages on macOS/Linux
• Contributing to open-source package repositories

Also Read: Python Vs Ruby: Complete Side-by-Side Comparison

As you explore the top open-source repositories, let's now dive into some of the best low-code GitHub projects that can accelerate your development process in 2025.

Top Low-Code GitHub Open Source Projects

Low-code platforms are gaining popularity as they allow developers and non-developers alike to build powerful applications with minimal coding. Here are some of the most popular low-code open source repositories on GitHub that are expected to thrive in 2025.

1. AppFlowy

AppFlowy is an open-source alternative to Notion that enables users to create highly customizable productivity apps without writing code. 

Key Features

• Customizable templates and modules
• Support for rich media integration
• Multi-user collaboration

Skills Gained

• App design and customization
• Collaborative tools integration
• User interface (UI) design

Tools and Tech

• Flutter
• Dart
• Firebase

Applications

• Personal productivity apps
• Team collaboration tools

Also Read: Firebase Vs. MongoDB: Difference Between Firebase & MongoDB

2. NocoDB

NocoDB is an open-source no-code platform that transforms databases into a collaborative no-code workspace.

Key Features

• Supports MySQL, PostgreSQL, and SQLite
• Collaborative database management
• Powerful data visualization tools

Skills Gained

• Database integration
• Data visualization
• SQL querying for non-programmers

Tools and Tech

• Node.js
• React
• MySQL/PostgreSQL

Applications

• Project management dashboards
• Data-driven applications

3. n8n

n8n is an open-source workflow automation tool that allows users to automate tasks and connect different apps and services with minimal coding.

Key Features

• 200+ integrations with popular services
• Visual workflow editor
• Extensible with custom code

Skills Gained

• Automation workflows
• API integrations
• Cloud service connections

Tools and Tech

• Node.js
• Docker
• JavaScript

Applications

• Business process automation
• Data synchronization tasks

Also Read: Top 10 JavaScript Libraries to Learn

4. Appsmith

Appsmith is a low-code platform that helps developers build internal tools quickly by connecting to databases, REST APIs, and GraphQL.

Key Features

• Drag-and-drop UI builder
• Built-in database and API integrations
• Role-based access control

Skills Gained

• UI/UX design
• API integration
• Database management

Tools and Tech

• React
• Node.js
• MongoDB

Applications

• Internal dashboards
• Admin panels

5. ToolJet

ToolJet is an open-source platform for building custom internal tools with a no-code interface for creating applications on top of databases and APIs.

Key Features

• Drag-and-drop interface
• API and database integration
• Customizable widgets and themes

Skills Gained

• Web application development
• API integrations
• Workflow automation

Tools and Tech

• Node.js
• React
• Postgres

Applications

• Customer support tools
• Analytics dashboards

6. Flowise

Flowise is a powerful low-code framework designed for building and deploying AI-powered workflows without extensive coding knowledge.

Key Features

• AI-based workflow automation
• Integration with GPT and other AI models
• No-code flow creation

Skills Gained

• AI integrations
• Workflow automation
• Natural Language Processing (NLP)

Tools and Tech

• Node.js
• TensorFlow
• OpenAI

Applications

• AI chatbots
• Automated data processing

Also Read: How to Make a Chatbot in Python Step By Step [With Source Code]

7. Refine

Refine is a React-based low-code framework designed to build customizable admin panels and dashboards with minimal effort.

Key Features

• Built-in admin panel templates
• Supports various databases
• Extensible via React components

Skills Gained

• React component design
• Backend and frontend integration
• UI/UX for admin panels

Tools and Tech

• React
• TypeScript
• Ant Design

Applications

• Admin panels
• Content management systems

After exploring these popular low-code  open source repositories on GitHub, let's now dive into how you can choose the right open-source project to contribute to and make an impact in the developer community.

How to Choose and Contribute to GitHub Open Source Projects?

Contributing to open source repositories on GitHub is an excellent way to enhance your skills, connect with the developer community, and build a strong portfolio. Here’s how you can select the right projects and make meaningful contributions to GitHub repositories.

1. How Do You Choose an Open-Source Project?

Selecting the right GitHub open source projects depends on your interests, expertise, and goals. Here are some actionable tips:

• Identify your areas of interest, such as web development, AI, or automation.
• Evaluate the project's activity level (e.g., recent commits, active issues).
• Choose beginner-friendly projects with a "good first issue" label.
• Consider the community’s responsiveness and documentation quality.

2. Why Should I Contribute to Open Source?

Contributing to  open source repositories on GitHub offers numerous personal and professional benefits:

• Enhances your coding and problem-solving skills.
• Builds your portfolio with real-world projects.
• Connects you with a global network of developers.
• Helps you learn collaborative tools and workflows like Git.

3. What Are the Key Benefits of Contributing?

Contributing to open source involves a lot more than just coding; it's about growth:

• Gain hands-on experience with cutting-edge technologies.
• Improve teamwork and communication skills.
• Earn recognition and opportunities in the tech industry.
• Make a positive impact by contributing to valuable projects.

4. What Are the Best Practices for GitHub Collaboration?

Effective collaboration ensures smoother contributions and community trust:

• Always keep an eye on the guidelines and code of conduct for the project.
• Communicate clearly with maintainers and contributors through issues and pull requests.
• Keep your commits clean and descriptive.
• Always sync your fork to avoid conflicts.

5. How to Get Started with Your First Pull Request?

Making your first contribution can feel daunting, but it’s easier with these steps:

• Fork the repository and clone it locally.
• Create a new branch for your feature or fix.
• Write clear, concise code and follow the project's style guide.
• Commit your changes. 
• Always open a pull request explaining your contribution.
• Engage with reviewers and make necessary adjustments.

Now that you know how to choose and contribute to open source repositories on GitHub, let's explore the trending skills you can learn and master by participating in these GitHub repositories.

Also Read: Top 8 Open Source Projects for Beginners To Try in 2024

Trending Skills to Learn Through GitHub Open Source Projects

GitHub repositories are a treasure trove of learning opportunities. By contributing to  open source repositories on GitHub, you can develop expertise in some of the most sought-after technologies that are shaping software development. 

Read on to discover the trending skills you can master through GitHub open-source projects.

1. Artificial Intelligence (AI) and Machine Learning (ML)

Both ML and AI are considered to be at the forefront of technology. GitHub projects serve as a perfect way to dive deep into these fields:

• Learn the basics of data structures along with algorithms for machine learning.
• Explore popular ML frameworks like TensorFlow, PyTorch, and Scikit-learn.
• Gain experience in training models, data preprocessing, and model evaluation.
• Contribute to AI-based applications in robotics, healthcare, and more.

Enroll in upGrad’s best Online Artificial Intelligence & Machine Learning courses today to unlock the skills you need for the future of technology!

2. DevOps and Continuous Integration/Continuous Deployment (CI/CD)

DevOps is essential for improving collaboration between development and operations. By engaging with open-source DevOps projects, you can master:

• Automation of deployment pipelines using tools like Jenkins, GitLab, and CircleCI.
• Infrastructure as Code (IaC) with Terraform, Ansible, and Kubernetes.
• Containerization and orchestration with Docker and Kubernetes.
• Monitoring and logging tools for production environments like Prometheus and Grafana.

3. Cloud Computing and Serverless Architecture

The demand for cloud expertise is skyrocketing. GitHub repositories can help you learn cloud technologies, including:

• Working with various cloud platforms.
• Developing serverless applications using AWS Lambda or Google Cloud Functions.
• Understanding cloud security practices and scalability.
• Contributing to open-source tools for cloud infrastructure management.

Kickstart your career in tech with upGrad’s Professional Certificate Program in Cloud Computing and DevOps course.

Also Read: AWS v/s Google v/s Azure: Who will win the Cloud War?

4. Web Development Frameworks (Front-End and Back-End)

Open-source projects offer great resources for mastering web development technologies:

• Front-End Frameworks: React, Angular, Vue.js, and Svelte for building interactive user interfaces.
• Back-End Frameworks: Node.js, Express, Django, Flask, and Ruby on Rails for server-side programming.
• Full-Stack Development: Work on both client and server sides with technologies like MERN (MongoDB, Express, React, Node.js).
• CSS Preprocessing, Responsive Design, and Web Accessibility (WCAG).

5. Blockchain and Smart Contracts

Blockchain technology is disrupting various industries, and open-source projects can help you understand:

• How blockchain networks operate and how to develop decentralized applications (dApps).
• Writing and deploying smart contracts using Solidity on Ethereum or other blockchain platforms.
• Security practices for blockchain networks and handling transactions.

Get started with the future of technology—enroll in upGrad’s free Blockchain: A Quick Introduction course today!

6. Data Engineering and Data Science

Master data processing, analysis, and visualization tools by contributing to data-driven projects:

• Learn big data technologies like Apache Spark, Hadoop, and Kafka for data processing.
• Contribute to projects focused on data analytics, data wrangling, and reporting with tools like Pandas, NumPy, and Matplotlib.
• Work with databases like PostgreSQL, MongoDB, and Redis for managing structured and unstructured data.

Also Read: Tensorflow vs Pytorch – Comparison, Features & Applications

Now that you know the trending skills you can master through GitHub open-source projects, let's explore some practical tips to help you make the most of your GitHub experience.

Tips for Maximizing Your GitHub Experience

GitHub is not just a platform to store code; it’s a community where developers come together to collaborate, learn, and grow. To make the most of your time on GitHub, here are some tips to help you stand out, contribute effectively, and continue improving your skills.

1. Create a Strong GitHub Profile

Your GitHub profile serves as your professional portfolio. So be careful while crafting it to make a good impression. 

• Profile Picture & Bio: Add a professional photo and a brief bio that highlights your skills, interests, and expertise.
• Pinned Repositories: Pin key projects that showcase your abilities, from open-source contributions to personal projects.
• Readme: Make your repositories informative with clear README files that explain your project’s purpose, setup, and usage.

2. Engage Actively with the Community

Being active in the GitHub community helps you grow as a developer and build connections:

• Comment on Issues and Pull Requests: Review and provide constructive feedback to others, or ask questions when you're unsure.
• Follow Developers and Projects: Follow repositories and developers whose work aligns with your interests. This keeps you in the loop with the latest updates.
• Join Discussions: Participate in discussions related to your field to stay informed and share your thoughts.

3. Focus on Quality Contributions

The value of your contributions matters more than the quantity. Focus on:

• Clear and Concise Commits: Write descriptive commit messages and break down large changes into smaller, manageable commits.
• Bug Fixes & Documentation: Start by addressing bugs or improving documentation, especially for beginner-friendly projects.
• Submit Well-Defined Pull Requests: Ensure your pull requests are clear, follow the project’s contribution guidelines, and include tests if applicable.

4. Leverage GitHub Actions and Features

GitHub offers a variety of tools to streamline your development process. Here are some useful features:

• GitHub Actions: Automate workflows like continuous integration (CI), deployment, and testing.
• Projects and Issues: Organize your work using GitHub Projects for task management and Issues for tracking bugs and new features.
• GitHub Pages: Host static websites and project documentation with GitHub Pages.

5. Stay Updated on Trending Projects

GitHub’s trending projects can help you discover popular open-source repositories and current industry trends:

• Explore Trending Repositories: Visit GitHub’s trending page regularly to discover cutting-edge projects.
• Star Projects: Star repositories that interest you to easily access them later and show your support.
• Contribute to Popular Projects: Engaging with trending projects not only helps you learn but can also boost your profile’s visibility.

With these tips to maximize your GitHub experience, you'll be well on your way to making impactful contributions. Now, let's take a look at the GitHub star trends and explore the most popular projects gaining traction on the platform.

GitHub Star Trends for Popular Projects

GitHub stars are a key metric for measuring the popularity and growth of repositories. Projects that accumulate stars rapidly often indicate high quality, community engagement, and relevance in the development ecosystem. 

Let’s dive into the star trends of the top repositories and observe how their popularity has evolved.

Also Read: Apache Spark Architecture: Everything You Need to Know in 2024

Trends for Stars from 12th to 7th

This section provides a detailed view of how the repositories ranked from 12th to 7th have gained traction. It will analyze their star growth and how their community involvement has contributed to their success.

Trends for Stars from 6th to 1st

Now, let’s take a closer look at the most popular repositories ranked from 6th to 1st, analyzing the significant events and reasons for their surge in stars.

These trends highlight the growth of these repositories and the importance of active development, community engagement, and relevant tools. By tracking them, you can spot projects shaping the future of development.

Now that you've explored GitHub Star trends for popular projects discover how upGrad can help you enhance your skills and stay ahead in the tech industry.

How Can upGrad Help You?

upGrad provides a range of industry-focused courses on key topics like GitHub, open-source collaboration, and trending technologies such as AI, ML, and DevOps. These programs are designed to give you practical skills that align with current industry needs. 

Some of the major courses include:

• LL.M. in AI and Emerging Technologies (Blended Learning Program)
• Cloud Computing and DevOps Program by IIITB - (Executive)
• Post Graduate Certificate in Machine Learning and Deep Learning (Executive)

Book a free career counseling session today for personalized guidance from industry experts, or visit your nearest upGrad career centre to start accelerating your future!

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References
https://github.blog/news-insights/company-news/100-million-developers-and-counting/
https://github.com/trending

Source Code Links

1. freeCodeCamp
2. VS Code
3. Azure Docs
4. Flutter
5. First Contributors
6. TensorFlow
7. React-Native
8. Kubernetes (K8s)
9. DefinitelyTyped
10. Ansible
11. Docusaurus
12. Homebrew
13. AppFlowy
14. NocoDB
15. n8n
16. Appsmith
17. ToolJet
18. Flowise
19. Refine