org.eclipse.gmf.runtime.diagram.ui.services.decorator.IDecoratorProvider   

    org.eclipse.stp.bpmn.diagram.providers.BpmnEAnnotationDecoratorProvider

    org.eclipse.stp.bpmn.diagram.providers.BpmnValidationDecoratorProvider

    org.eclipse.gmf.runtime.diagram.ui.internal.services.decorator.DecoratorService

    org.eclipse.gmf.runtime.diagram.ui.providers.internal.DiagramDecoratorProvider

    org.eclipse.gmf.ecore.providers.EcoreShortcutsDecoratorProvider

Projects.
AJDT
BIRT
Buckminster
CDT
DTP
DSDP.DD
DSDP.TM
DLTK
Eclipse Monkey
ECF
Eclipse Platform
EMF
MQ, MT, VF
GEF
GMF
MDT
Model to Text (M2T) - JET
Mylyn
SOA Tools Platform (STP)
TPTP
Web Tools Platform (WTP)