The FIWARE Context Broker, a reusable context-handling component, has been adopted by CEF (Connecting Europe Facility) as a so-called building block: https://www.fiware.org/2018/08/08/fiware-context-broker-launches-as-a-cef-building-block/.
The Context Broker makes it possible to store and access context-information using simple context models. It offers a RESTful API and supports subscriptions and notifications. Learn more here.
Notably, we offer a FIWARE Context Broker-based lab exercise in our course AKIR (Context-Aware IoT Applications). The objective is to teach students about FIWARE context modeling and introduce them to Orion Context Broker. The exercise was developed at ZSUT by Szymon Caban, as his BS thesis.