Editing EclipseRCP

Applications other than IDEs can be built using a subset of the platform. These rich applications are still based on a dynamic plug-in model, and the UI is built using the same toolkits and extension points. The layout and function of the workbench is under fine-grained control of the plug-in developer in this case. 

When we say that the Rich Client Platform is the minimal set of plug-ins needed to build a platform application with a UI, we mean that your application need only require two plug-ins, org.eclipse.ui and org.eclipse.core.runtime, and their prerequisites. 

However, rich client applications are free to use any API deemed necessary for their feature set, and can require any plug-ins above the bare minimum. Examples include the Help UI, and the Update Manager.