Here is the list of WindowBuilder / SWT Designer / Swing Designer / GWT Designer wizards (Select File > New Other from the main Eclipse menu to open the wizard dialog):

Examples
SWT/JFace Java Project
Widget Palette Plug-in
Forms
- Composite
- DetailsPage
- FormPage
- MasterDetailsBlock
- SectionPart
- ViewPart
GWT
- Composite
- DialogBox
- GWT Java Project
- GWT Module
- GWT RemoteService
- PopupPanel
JFace
- ApplicationWindow
- Dialog
- TitleAreaDialog
- WizardPage
RCP
- ActionBarAdvisor
- EditorPart
- Perspective
- PreferencePage
- PropertyPage
- ViewPart
Swing
- Application Window
- JApplet
- JDialog
- JFrame
- JInternalFrame
- JPanel
SWT
- Application Window
- Composite
- Dialog
- Shell