JNLPDownloader 0.0.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. JNLPDownloader for Mac lies within Internet & Network Tools, more precisely Download Managers. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac application is an intellectual property of JNLPDownloader Team.
From the developer:
JNLPDownloader allows you to download a web start project and provides you with a way to run it offline.
Given a url of a jnlp file, JNLPDownloader downloads every jar declared in the main jnlp or extension, every native library, and stores them in a directory with scripts to run the application in Mac.
You may want to check out more software for Mac, such as Ooyala Backlot, AlphaSmart Manager or Nikonians Uploader, which might be similar to JNLPDownloader.