@NTanghe welcome to the community! 
You have a few ways to share your bindings:
-
Submit the Pull Requests for them - one PR per binding. It will be reviewed by maintainers and after that they’ll become official openHAB Add-ons which would be awesome! As @mstormi highlighted, the Developer Guide should get you going.
Note that when you submit a new Pull Request and it has no build errors, your binding becomes automatically available to download as a JAR from this URL -
Other option is to distribute your JAR through the Eclipse IoT Marketplace - see this post for more details.
Thank you for your work!
Best regards