What coding software to facebook app developers use?

[Alpha and Omega]

You know those terrible apps such as "how you will die" or "how long will you survive in a zombie apocalypse"? is it XML, java or what? thanks

[Raphael]

You can use HTML, Javascript, CSS, PHP and probably some more.

Tutorial:
http://www.labnol.org/internet/tutorial-...ion/10116/

[Bocutz]

You must create application on facebook first of all, implement few scripts from facebook and coding away. You can use almost all language - php, xhtml, javascript, flash, and much more.

[Matt Anonymous]

php and java are 2 big ones php being opensource and preferred by devs and java because of it's versatility i.e. you can use the app on any device that as the runtime on it. These 2 server side languages mixed with some flash or JQuery to graphically enhance the client side of the app would be most effective.