A library for Java that implements the Feature Toggle pattern. FF4J, stands for Feature Flipping for Java.
FF4j is an implementation of Feature Toggle pattern : Enable and disable features or your applications at runtime thanks to a dedicated web console, REST API, JMX or even CLI.
It also handles properties and provides generic interfaces to work with configuration properties, store them in 10 different databases and integrates with both Archaius and Commons-Configuration.
More information can be found at ff4j.org or Reference Documentation in the wiki.