Apache ACE is a software distribution framework that allows you to centrally manage and distribute software components, configuration data and other artifacts to target systems. It is built using OSGi and can be deployed in different topologies. The target systems are usually also OSGi based, but don't have to be.
This is the wiki for the project. The main website can be found at http://ace.apache.org/. We use this wiki to collaborate on documentation. When a document is done, it will most likely move to the website.