Simple example project that shows how to add JavaFX controls and e(fx)clipse services to a SWT based Eclipse 4 application.
The description on how to add JavaFX controls to a SWT based Eclipse 4 application can be found here: https://blog.codecentric.de/en/2015/04/add-javafx-controls-swt-eclipse-4-application-eclipse-rcp-cookbook/
The description on how to use e(fx)clipse services in a SWT based Eclipse 4 application can be found here: https://blog.codecentric.de/en/2015/04/add-p2-update-functionality-to-an-efxclipse-application-eclipse-rcp-cookbook