The GUI tools provided with Celtix Enterprise are provided by the Eclipse SOA Tools Platform project and are intended to be installed into an existing Eclipse installation.
In addition the GUI tools require that you have the following Eclipse plug-ins installed:[1]
Eclipse Modeling Framework (EMF) 2.2.0
Data Tools Platform (DTP) 1.0 M2
Web Tools Platform (WTP) 1.5.2
Graphical Editing Framework (GEF) 3.2.1
Java EMF Model (JEM) 1.2.1
[1] If you install the GUI components using the recommended Eclipse Update mechanism, the required plug-ins are loaded as part of the install process.