MonkeyBread Software has released MBS FileMaker Plugin 2.5 for Mac OS X or Windows. Among other features, it adds CURL upload/download and CUPS printer functions.
MBS is a FileMaker Pro plug-in that supports a plugin architecture that enables additions to its built-in feature set. It includes 765 different functions.
MBS FileMaker Plugin 2.5 for Mac OS X or Windows is available directly from the MonkeyBread website (http://www.monkeybreadsoftware.de/) with licenses starting at US$149. Not all functions are available in both versions, so check the specs. A free trial download is also available.