Visit the Orekit forge, the place to find all you may need from the project:
Questions and comments to the Orekit community can be sent to several mailing lists.
Be sure that we test the code before we release it. However, you might find something that isn't right. To report bugs please use our tracking system. And remember: the more information we get the easier we can reproduce and fix it.
Also, you might need some feature that isn't provided yet by Orekit. To ask for new features, submit a ticket to the tracking system or post a message to the dev-mailing list (you will have to subscribe first).
If you're interested in contributing to the project, please subscribe to the dev-mailing list first and join the discussion about ongoing development. Share your ideas and plans with us and prove your talent by submitting patches to the mailing list or attach them to the according tickets.
Translation: Orekit messages translations in all languages are welcome!