JavaHMO is hosted on Sourceforge.net as an open source project. Sourceforge provides
extensive online documentation on how to contribute code to projects.
A discussion forum is hosted on the project site for developers who are interested in contributing to the project.
If you want to request a new feature for the project, you can add the request to the project's tracking system.
If you wish to participate as a developer in the project, view the developer discussion forum or contact the project admin.
If you wish to make a donation, Sourceforge has a site for donations.