• When the Hacktoberfest20 comes to an end, I will be distributing some free Open Source t-shirts to a few contributors

Hacktoberfest is a month-long celebration of open source software in partnership with Github.

A repository for beginners to create their first Pull Request.

All of your suggestions are welcome!!

By	What	How	Details
DigitalOcean		Four pull requests to any public repo on GitHub.	hacktoberfest.com (Verified 2020)
Adobe / Magento		Submit 5 pull requests to https://github.com/adobe or https://github.com/magento	Details and Blog
Appwrite		Create one or more merged pull requests to any Appwrite repository (https://github.com/appwrite). Stickers, Magnets, Buttons, and T-shirts
Aqua Security		1 Contribution: OSS superhero sticker pack, 3 Contributions: OSS superhero sticker pack and a special edition Aqua Hacktoberfest t-shirt, 5 Contributions: all of the above and the "Kubernetes Security" book, co-authored by Liz Rice, VP Open Source Engineering	Details
Circle CI		1 to 3 pull requests: Limited-Edition Sticker. 4+ pull requests: Limited-Edition T-shirt	Details
Devfolio		4 or more pull requests: Limited-Edition Sticker, If your PRs turn out to be exceptional: Limited-Edition T-shirt	Details
Flutterwave.com		2 or more pull requests to any of the projects from https://developer.flutterwave.com/docs/plugins : Limited-Edition T-shirt	Details
Gatsby		"1 PR: Level 1 swag; 5 PRs: Level 2 swag"	Details
Globo.com		"1 merged PR: 👕". Any repo on Globo.com	Details
Hasura		"Make a PR to The Hasura GraphQL Engine or The GraphQL Tutorial Series. 2 hacktoberfest PRs for a 👕."	Details
JabRef		1 merged pull request: sticker, 5 merged pull requests: 👕. Any repo on https://github.com/jabref/.	Details
Jenkins		PR to any repositories under featured repositories. The PR must be at least raised in October 2020 and you should not be inactive for seven days or more during code review. Guaranteed Swag for Top 20 contributors, and rest is to be decided. Check the announcement on the blog.	Details
Kong		"If your Pull Request to Kong/kong was accepted, and it fixes a bug, adds functionality, or makes it significantly easier to use or understand Kong, congratulations! You are eligible to receive the very special Contributor T-shirt! Go ahead and fill out the Contributors Submissions form."	Details
LadybugTools		1 or more pull request	Details
lakeFS		"1 PR on our GitHub repo for a collection of stickers, 2 or more gets stickers and a lakeFS t-shirt 👕"	Details
LBRY		"A sweet LBRY sticker for 1 PR, T-shirt for a Good PR and 10,000 LBC for first PR of this month"	Details
Les-Tilleuls.coop		"To win a t-shirt, make 3 pull requests on API Platform's GitHub repositories by October 31st, and then fill in this form ."	Details
MayaData		"anyone who submits a pull request to one of our github repos" gets a 👕, BEST PR gets a 💻	Details
Operation Code		"Resolve 3 issues and receive a white or black t-shirt! Merge 2 pull requests and receive stickers!"	Details
Opsdroid		"Solve issues or improve documentation. 5–10 contributions is probably sticker worthy"	Details
Parity		anyone who makes a significant contribution is eligible for a limited edition gym bag	Details
QMK		Interact 4 times with a QMK repo OR donate $15 to cKeys	Details
SAP		"a book from sap press for the user who create more pull requests in the ABAP Projects"	Details
Sense/Net		"The first 100 participants who make a pull request"	Details
Umbraco		"you’ll need to have at least 1 PR approved on any Umbraco repository"	Details
Uno		"anyone who contributes a pull request to the Uno Platform on GitHub between October 1 and October 31 will receive a Uno Platform T-shirt plus some limited edition swag."	Details
Valor		1 PR: pen and sticker. 3 PRs: notepad or wooden phone stand. 5 PRs: pen, sticker, notepad, and a wooden phone stand.	Details
Xamarin		1 pull request for the stickers, 4 pull requests for a T-shirt, 10 pull requests to be eligible to win a trophy.	Details
Devdojo		3 pull request for t T-shirt	Details

You can add references to some cool open source projects below as well.

Zulip is 100% open source software, built by a vibrant community of hundreds of developers from all around the world.

Developing Open Source Software and Hardware to improve people's lives.

This technology could fall into the right hands. Mozilla has 30 repositories available. Follow their code on GitHub.

Learn to code for free with millions of other people around the world.

List of Data Structures and Algorithms.

An App that lets users gamify real-life choices and activity with in-app rewards.

Learn to code for free with millions of other people around the world.

A declarative, efficient, and flexible JavaScript library for building user interfaces. Plenty of resources to learn. (official)

Build cross-platform desktop apps with JavaScript, HTML, and CSS. Plenty of resources to learn and contribute. (official)

A tribute and log of beloved products and services killed by Google. This is a fun open source project that encourages contributors for the Hacktoberfest!

A website that helps you find projects/issues based on your required/preferred language or issue labels.

Another useful tool for searching issues to fix.

List of projects with issues that can be resolved by beginners.

A list of issues that are labeled “first-timers-only”.

A list of awesome beginners-friendly projects.

TensorFlow is an open-source software library for dataflow programming across a range of tasks. It is a symbolic math library and is also used for machine learning applications such as neural networks.

An open-source container system for automating deployment, scaling, and management of containers application.

DuckDuckGo is a privacy-conscious search engine that doesn't track users. Instant Answers is a feature that provides answers without needing to open up a website.

An open-source JavaScript library for creating web components that are then used to build web pages and apps, Polymer is currently being developed by Google developers and contributors on GitHub. Central to a wide range of Google services and websites, including YouTube, Google Earth, and Google Sites, Polymer received an update in January (Polymer 2.4) which is paving the way for 3.0 and TypeScript support.

Blender is the free and open-source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even video editing and game creation.

SageMath is a computer algebra system with features covering many aspects of mathematics, including algebra, combinatorics, graph theory, numerical analysis, number theory, calculus, and statistics. It's built on top of many existing open-source packages: NumPy, SciPy, matplotlib, Sympy, Maxima, GAP, FLINT, R, and many more.

Material Ocean is a theme for various applications based on a blueish ocean color scheme.

A starter project for Ruby On Sinatra web app projects to introduce programmers to Ruby programming. Link to Live Application HERE

Coala is a package that provides linting and code-fixing in a single config file, irrespective of language. It’s a beginner-friendly community. Documentation is well written, issues are properly tagged with ‘easy’, ‘newcomer’, or ‘hard’.

Google Developer Group (GDG) Philippines is a group of enthusiastic Filipino developers interested to collaborate and learn more about new technologies.

GDG Philippines is an independent group hence our activities and the opinions expressed on this Page should in no way be linked to Google, the corporation.

Jenkins X is an open-source, opinionated way to do continuous integration and continuous delivery (CI/CD) on Kubernetes. As such, it provides a modern, best practices approach to CI/CD for cloud-native applications. Jenkins X aids developers in provisioning Kubernetes clusters, automates CI/CD, provides different virtual environments for development, staging, and production using Kubernetes namespaces, and provides preview environments for pull requests.

A Community that aims to develop student's creativity in the fields of science and technology. This community was created by the Malang State Polytechnic and all material provided could be implemented by the general public.

Signal uses standard cellular telephone numbers as identifiers and uses end-to-end encryption to secure all communications to other Signal users. The apps include mechanisms by which users can independently verify the identity of their contacts and the integrity of the data channel.

GNU/Linux User's Group, NIT Durgapur is a group of enthusiastic open source developers interested to collaborate and learn more about new technologies.

WhatsApp is a cross-platform instant messaging and voice calling application for smartphones. In addition to text messaging, users can send images, videos, and PDF documents, as well as download for free from an Internet connection.

Red Hat, Inc. is an American multinational software company providing open-source software products to the enterprise community.

Open source mental health communication community.

The Open Source Software Institute is a U.S.-based 501, non-profit organization whose mission is to promote the development and implementation of open-source software solutions within US Federal, state, and municipal government agencies.

The Open Source Software created by Uber

The plotly Python library is an interactive, open-source plotting library that supports over 40 unique chart types covering a wide range of statistical, financial, geographic, scientific, and 3-dimensional.

The Spotify Android SDK allows your application to interact with the Spotify app service. The capabilities of this SDK include authentication and getting metadata for the currently playing track and context, issuing playback commands, and initiating playback of tracks, albums, or playlists.

Python is powerful... and fast; plays well with others; runs everywhere; is friendly & easy to learn; is Open.

Software Package Data Exchange® (SPDX®) is an open standard for communicating software bill of material information (including components, licenses, copyrights, and security references).

Systers provide a private, safe online forum for women involved in the technical aspects of computing. Our members gain support by networking, sharing advice and experiences, and collaborating on various projects. We welcome women of all ages and at any stage of their studies or careers.

Read the Docs simplifies software documentation by automating building, versioning, and hosting of your docs for you.

KDE e.V. is a registered non-profit organization that represents the KDE community in the legal and financial entities. The association supports KDE’s work in cash, hardware, and other donations, and then the use of donations to help the KDE development, but no influence on development.

WildFly is a Java EE 8 certified application server. The word "application server" has been coined in relation to Java Enterprise application; you can think of it as it’s a piece of Java software where your application can be provisioned using the services provided by the application server. WildFly simplifies the development of enterprise applications by providing a list of services out of the box.

MkDocs is a fast, simple, and downright gorgeous static site generator that's geared towards building project documentation. A hardware company called Seeed created a Wiki to document all of their boards, and so I created a Wiki page for TinyCircuits to document all of our boards too! This platform is great for any documentation needs, and I'm looking forward to hopefully creating/contributing a dark mode for it someday.

Free online machine learning course created by google with cool projects.

Joomla! is an award-winning content management system (CMS), which enables you to build websites and powerful online applications.

Get OpenSauced! Open Sauced provides structured onboarding for new contributors to open source. A project to identify your next open source contribution.

Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase.

MongoDB is a cross-platform document-oriented database program.MongoDB is an open source NoSQL database.

This project aims at providing guidance & simplifying the way beginners make their first contribution.

This repository contains the source code for the Windows Package Manager Client (aka winget.exe).

Kubernetes (commonly referred to as "K8s") is an open-source system for automating deployment, scaling, and management of containerized applications originally designed by Google and donated to the Cloud Native Computing Foundation.

Atom is a modern open-source text editor developed by GitHub. It is designed to be approachable out of the box yet highly customizable. Atom is built using web technologies: the look and feel can be customized using CSS and new features can be added with HTML and JavaScript. There are also thousands of community created themes and packages available.

The Go programming language is an open-source project to make programmers more productive. Go is expressive, concise, clean, and efficient. It's concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel type system enables flexible and modular program construction. Go compiles quickly to machine code yet has the convenience of garbage collection and the power of run-time reflection. It's a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.

This repository follows MIT License.