The documentation provided here is developed by the Apache Geronimo open source community and it is under the Apache License. This is a community effort, your contributions are welcome!
These documents are grouped by topic and most of them include sample applications with working examples. Additional topics and translations are available in the project's wiki.
Apache Geronimo v2.2 - In-progress
Apache Geronimo v1.2 - Never released
Apache Geronimo v1.1 Includes Geronimo v1.1.1
Apache Geronimo Project Management - Includes release roadmaps and status.
Want to contribute with the documentation? Check the Get Involved section for details.
The following books have their entire content available online:
A number of print books covering Geronimo are planned or in production.
There are a number of articles and interviews available.