Eigen is a room modeling reverb from Canadian developers Lese, which lets you set your audio source and listening position within a room with proportions of your choosing. Want to listen to a clap via a narrow hallway? Or a piano suspended from the top of a hall? You can do that. The plugin has a use case for both musical applications and sound for video.
Going further, Eigen lets you set each of the six surfaces to different materials, and an inbuilt room resonant analyzer lets you spot problem frequencies
