openJabNab exists thanks to volunteers, who are giving a lot of time, and even money, for this project and servers.
You can contribute to the project with a donations, that is going to pay a part of the server rental, or that will motivate developers.
If you are a Qt / C++ developper, a web developer ( PHP / html / Javascript, ... ), you could help us to improve openJabNab.
If you are a mobile (Android, IOS, blackberry, ...) developper, you could help creating mobile apps.
You could also contribute by sending us ideas for new features or improvements.
Here is a list of links to website who help us providing some data