To make it easier to find and compare libraries that solve similar, common problems we maintain a catalog of categories.
The catalog itself is maintained via plain YAML files on GitHub. If you'd like to add a library to a category please file a Pull Request there.
Both Composer packages as well as direct references to GitHub repositories are possible. If your library is published on Packagist please always prefer to reference the Composer package and make sure you have referenced your GitHub repository in your composer.json.