by Team PyTorch

More than 1,900 people worked hard in this year’s PyTorch Annual Hackathon to create unique tools and applications for PyTorch developers and researchers.

Notice: None of the projects submitted to the hackathon are associated with or offered by Meta Platforms, Inc.

This year, participants could enter their projects into following three categories:

  • PyTorch Developer Tools: a tool or library for improving productivity and efficiency for PyTorch researchers and developers.
  • Web and Mobile Applications Powered by PyTorch: a web or mobile interface and/or an embedded device built using PyTorch.
  • PyTorch Responsible AI Development Tools: a tool, library, or web/mobile app to support researchers and developers in creating responsible AI that factors in fairness, security, privacy, and more throughout its entire development process.

The virtual hackathon ran from September 8 through November 2, 2021, with more than 1,900 registered participants from 110 countries, submitting a total of 65 projects. Entrants were judged on their idea’s quality, originality, potential impact, and how well they implemented it. All projects can be viewed here.

Meet the winners of each category below!


First Place: RaNNC

RaNNC is a middleware to automate hybrid model/data parallelism for training very large-scale neural networks capable of training 100 billion parameter models without any manual tuning.

Second Place: XiTorch

XiTorch provides first and higher order gradients of functional routines, such as optimization, rootfinder, and ODE solver. It also contains operations for implicit linear operators (e.g. large matrix that is expressed only by its matrix-vector multiplication) such as symmetric eigen-decomposition, linear solve, and singular value decomposition.

Third Place: TorchLiberator

TorchLiberator automates model surgery, finding the maximum correspondence between weights in two networks.

Honorable Mentions

  • PADL manages your entire PyTorch work flow with a single python abstraction and a beautiful functional API, so there’s no more complex configuration or juggling preprocessing, postprocessing and forward passes.
  • PyTree is a PyTorch package for recursive neural networks that provides highly generic recursive neural network implementations as well as efficient batching methods.
  • IndicLP makes it easier for developers and researchers to build applications and models in Indian Languages, thus making NLP a more diverse field.


First Place: PyTorch Driving Guardian

PyTorch Driving Guardian is a tool that monitors driver alertness, emotional state, and potential blind spots on the road.

Second Place: Kronia

Kronia is an Android mobile app built to maximize the harvest outputs for farmers.

Third Place: Heyoh camera for Mac

Heyoh is a Mac virtual camera for Zoom and Meets that augments live video by recognizing hand gestures and smiles and shows animated effects to other video participants.

Honorable Mentions

  • Mamma AI is a tool that helps doctors with the breast cancer identification process by identifying areas likely to have cancer using ultrasonic and x-ray images.
  • AgingClock is a tool that predicts biological age first with methylation genome data, then blood test data and eventually with multimodal omics and lifestyle data.
  • Iris is an open source photos platform which is more of an alternative of Google Photos that includes features such as Listing photos, Detecting Categories, Detecting and Classifying Faces from Photos, Detecting and Clustering by Location and Things in Photos.


First Place: FairWell

FairWell aims to address model bias on specific groups of people by allowing data scientists to evaluate their dataset and model predictions and take steps to make their datasets more inclusive and their models less biased.

Second Place: promp2slip

Promp2slip is a library that tests the ethics of language models by using natural adversarial texts.

Third Place: Phorch

Phorch adversarially attacks the data using FIGA (Feature Importance Guided Attack) and creates 3 different attack sets of data based on certain parameters. These features are utilized to implement adversarial training as a defense against FIGA using neural net architecture in PyTorch.

Honorable Mentions

  • Greenops helps to measure the footprints of deep learning models at training, testing and evaluating to reduce energy consumption and carbon footprints.
  • Xaitk-saliency is an open-source, explainable AI toolkit for visual saliency algorithm interfaces and implementations, built for analytic and autonomy applications.

Thank you,

Team PyTorch