We accept with pleasure all type of contributions:
Have a look on the Magento Connector Developer’s Guide which is more complete, most of the information is the same.
The GitHub project is: https://github.com/OCA/connector
If the connector belongs to the e-commerce domain, you may want to reuse the pieces of the E-Commerce Connector module.
The naming conventions for the new projects are the following:
Name of the project if it is in the OCA:
Actually, the Magento and Prestashop connectors do not respect this convention for historical reasons (magentoerpconnect, prestashoperpconnect). New projects should ideally respect it.