I've created a repository for Custom Mycodo Input, Output, Function, and Widget modules at https://github.com/kizniche/Mycodo-custom to document the custom modules that have been created. I plan to link this repository for users to be able to find from the main Mycodo repository.

If you would like to add to this, create a pull request with the code or message me and I'll review it for inclusion in the repository.