Mark Theriault has written a neat script for Max users to take Blender fluid sims and bring them into Max.
You might be thinking: "I already use Blender exclusively, what can I do with a script that takes Blender fluid sims and brings them into 3DS Max?" Honestly? Unless you are using Blender in your production pipeline with Max, probably nothing. But if you are using Max, and have been using Blender every so often, this might help you on your way to using Blender just that much more.
From the site:
BlenderFluids2Max: An importing script I wrote because I was amazed that Blender had fluid simulation. I searched and searched and no one wrote one to get it into Max. So I wrote one. It also includes a script that was written by someone else to get the fluids out of Blender as an OBJ sequence and my script brings those in and adds animation to it. I don't have a tutorial yet but one day I will get to it. It's really system heavy so use at your own risk. It eats RAM for dinner. For real.
The script (zip) comes with a python script exporter (the .obj exporter) and a max script to import the information into Max. The site also has an example video from Max showing the results of the import. It's great to see Blender-only tools getting Max users to want the results importated into their for-money program!