As the author of the eclipse tooling for JavaFX I checkout my competitors (which is the wrong word here because I don’t see us competing) which is Netbeans in my case.

I just download the latest nightly build and voilá they have now:

• Autocompletion in the CSS-Editor for -fx properties
  
• Autocompletion in the FXMl-Editor for element properties
  

Both of those features are also available in e(fx)clipse since a long time.

• CSS autocompletion
  
• FXML autocompletion
  

I’m currently working on improving the autocompletion for fxgraph and fxml for the upcoming 0.0.14 release. I wish I had more time to work on e(fx)clipse because this tooling stuff is more fun I ever thought it is. I have soooo many ideas and improvements but no time to implement them all.