ImageMagick is a swell open source package that can do all manor of things to images, including save them in many different file formats. I was asked for a way to save files out of Lightroom into production-oriented formats like DPX, so I wired ImageMagick into a Lightroom plug-in that you can download for free.
So far it just lets you save into six additional file formats and pick the bit depth. ImageMagick has many more formats and other capabilities that could be added in the future, so let me hear your requests!
Version: 0.5 Date: 11 November 2014 Download (includes Mac & Win)