If you're interested in FRP in terms of GUI programming, as described in the linked article, you should definitely checkout ReactFX [0], an FRP library for JavaFX, and also the author Tomas Mikula's blog [1] that contains very convincing examples of FRP's usefulness for real UI tasks [2].

[0]: https://github.com/TomasMikula/ReactFX

[1]: http://tomasmikula.github.io/blog/

[2]: http://tomasmikula.github.io/blog/2014/04/25/combining-react...

If you are confused by the term FRP and its different interpretations, I tried to summarize them in a stackoverflow answer: http://stackoverflow.com/questions/22795062/is-it-possible-t...