My NXP LPC1114 downloader app version 0.1.0a has finally been released. Right now only the Windows installer is available. The same executable will run on Linux with the mono runtime installed. The files from the install directory can be copied to a Linux machine after it is installed on Windows if you want to try that.
UPDATE: The raw Linux files are also available at that same link. They may also work on a Mac with mono installed, but I have no way of trying that. If anyone tries it, I would be interested in the results.