farmOS is a web-based application for farm management, planning, and record keeping.
Openlayers is used for mapping and geodata manipulation.
For more information, read through some of the Frequently Asked Questions.
2016 NOFA Summer Conference
Michael Stenta presented a farmOS workshop at the 2016 NOFA Summer Conference. It covers the core features of farmOS, how to get started, where to find help, and how to contribute back to the project.
The full workshop recording is available on YouTube: https://youtu.be/w0ZCu8NsWKE