Neo4j is a project with a vast ecosystem and a lot of space for contributions. Where you can and want to pitch in depends of course on your time, skill set and interests. Below are some of the areas that might interest you:
Some parts of the documentation need extra care from the community to stay up to date. They typically refer to different kinds of community contributions. The easiest way to contribute fixes is to comment at the online HTML version.
Copyright © 2014 Neo Technology