This is a manually maintained list of Sling bundles which have their documentation here.
See also the complete list of modules - some of them have their own "local" documentation in their README files instead of here.
The OSGi installer is a very flexible and powerful service to manage provisioning and updates of an OSGi system. It is independent of Sling and can be extended by several plugins.
Libraries and utilities which are not reliant on Sling.