Equinox OSGi is the name of an Eclipse project that aims to implement OSGi R4 core framework specification, which is basically a plugin system which allows to implement an application in a set of "plugins" using common services and infrastructure.
Equinox OSGi is the name of an Eclipse project that provides a certified implementation of the OSGi R4 core framework specification. Equinox is basically a plug-in system that allows developers to implement an application in a set of "bundles" using common services and infrastructure.