farmOS is a web-based application for farm management and planning.
You can set it up yourself on your own web server, or you can use Farmier, a farmOS hosting service.
farmOS is under active development, but is still relatively new. The focus right now is laying a strong groundwork, so that others can more easily join in and contribute.
Documentation, screenshots, videos, tutorials, etc will be posted here soon.
Drupal Distribution: http://drupal.org/project/farm
Development of farmOS is a collaborative process. There are lots of ways to contribute. You don't need to be a developer.
All feature requests, bug reports, and planning is done in the Drupal.org issue queues. There is a separate queue for each of the farm modules, and for the distribution itself. See the full list of projects.
Join in the discussion in our #farmOS IRC chat room!
If farmOS is useful to you, and you want to support future development, consider donating to the project!