Support open source and earn a limited edition T-shirt!
Start HackingEvent details
Hacktoberfest® is open to everyone in our global community. Whether you’re a developer, student learning to code, event host, or company of any size, you can help drive growth of open source and make positive contributions to an ever-growing community. All backgrounds and skill levels are encouraged to complete the challenge.
- Hacktoberfest is open to everyone in our global community!
- Pull requests can be made in any GitHub-hosted repositories/projects.
- Sign up anytime between October 1 and October 31.
Rules
To qualify for the official limited edition Hacktoberfest shirt, you must register and make four pull requests (PRs) between October 1-31 (in any time zone). PRs can be made to any public repo on GitHub, not only the ones with issues labeled Hacktoberfest. If a maintainer reports your pull request as spam or behavior not in line with the project’s code of conduct, you will be ineligible to participate. This year, the first 50,000 participants who successfully complete the challenge will earn a T-shirt.
Read more about participation details.
Hacktoberfest projects
You can contribute to any project on GitHub. Here are a few looking for some help:
Displaying all Hacktoberfest projects
gensim
PythonTopic Modelling for Humans
Implement saving to Facebook format
eslint
JavaScriptA fully pluggable tool for identifying and reporting on patterns in JavaScript
curly: multi-or-nest option reports an error for a single-statment block with a semicolon on the next line
OpenRCT2
C++An open source re-implementation of RollerCoaster Tycoon 2 🎢
Multiplayer server using all available memory
validator.js
JavaScriptString validation
🔔 announcement: hacktoberfect is here
linkerd
ScalaA service mesh for Kubernetes and beyond. Main repo for Linkerd 1.x.
Please add Consul Announcer
bitcoin
C++Bitcoin Core integration/staging tree
appveyor should print boost test_suite log on failure
gocd
JavaMain repository for GoCD - Continuous Delivery server
Order pipeline group names in alphabetical order when cloning a pipeline
aiohttp
PythonAsynchronous HTTP client/server framework for asyncio and Python
docs: explain why all setups we set to app
monero
C++Monero: the secure, private, untraceable cryptocurrency
ARM64 NEON with crypto extensions has 64-bit to 128-bit multiply
Projects focused on climate change
Because we believe open source technology has the potential to change the world, we wanted to showcase a few projects focused on combating climate change:
pangeo
Jupyter NotebookPangeo website + discussion of general issues \ related to the project.
climate
Jupyter NotebookMirror of Apache Open Climate Workbench
electricitymap-contrib
PythonA real-time visualisation of the CO2 emissions of \ electricity consumption
Global events
Celebrate and support open source technology by organizing or attending a local event.
Words from our sponsors
We’re so excited to partner with DEV – an open source community platform built for developers of all backgrounds and experience levels – for this year’s Hacktoberfest. As a torch-bearer for open source, transparency, and inclusion in tech, DEV fully embodies the Hacktoberfest values. Check out the #Hacktoberfest tag on DEV for announcements and resources before, during, and after the event.
As participants long before we became sponsors, we’re thankful to our friends at DigitalOcean for creating Hacktoberfest. As an advocate of developers and startups, their cloud platform uniquely hits on both simplicity and scalability. And their Community platform has become a global resource for education on development and DevOps topics, further illustrating that they, too, are stewards of open source.