Toggle button metro style:
You can get it at the usual places.
JMetro has been recently blatantly copied by someone else who has than tried to make it look like it was his own work. JMetro is under BSD license as are other components/controls present in the JFxtras repository, BSD license legally requires you to give credit to the original owner of the work.
There is no problem in using the work on commercial/non-commercial projects and on creating derivative work as long as you give credit to the original creator. Since I’m giving away my work for free I think the least I can ask for is some credit.