I have an obj sequence of a fluid simulation from Realflow. I've found a few tools that can import an obj sequence into blender, but most are outdated and don't work. Are there any scripts or plug-ins that can do that?
There is a patch for Blender allowing you to use RealFlow .bin files inside blender.
However it looks like the patch is no longer in development, due to alembic support coming very soon.
This answer is a bit late, but I recently developed a Blender add-on for importing OBJ sequences (it also supports STL and PLY). It's called Stop Motion OBJ. It supports objects with changing topology (for example, your fluid simulation). Here's a link to the blenderartists thread where I announced it. Make sure to read through the README on the Github page for some important notes on how to use it.