The Pulsar project is split up into a number of repositories, all hosted on GitHub.
The very nature of the way Pulsar works means that there are a large number of packages that come together to make up the editor and each of these have their own repository.
We also have a number of other repositories to host the website, package backend & frontend and our organization wide documentation & templates.
All of the Pulsar repositories can be found under the organization at https://github.com/pulsar-edit but below is a list of some of the more regularly used ones you may wish to visit in order to contribute to the project. For a more comprehensive list you can visit the org-level REPOS file.