The eZ Publish Community Project is where innovation happens. This is where the community and eZ Engineers collaborate, contributing to the eZ Publish kernel in order to make it tomorrow's Content Management Platform. To learn more about the eZ Community Project project and how it is structured, and the Governance Board, read here: eZ Publish Community Project : governance structure and role are now final.
Check this page : Downloads
A forge is available for any community member to create his/her own project, such as an eZ Publish extension or solution. The forge will help trigger collaborative development around the project. More information on the topic here: http://share.ez.no/about/get-involved#develop
Alternatively, you can browse the existing community extensions and add-on catalog: Projects
A more comprehensive list of available documentation is available here: http://share.ez.no/about/get-involved#doc
Your feedback is key to making eZ Publish evolve. The issue tracker is one of the ways to contribute. We encourage you to report bugs, request enhancements, and comment on existing issues when you believe something is wrong or should be enhanced. You can find the issue tracker here: http://issues.ez.no/ezpublish