Fizzerb
A reverb that actually simulates sound bouncing around in a space, using 2D path tracing and the principles of physically-based rendering.
Usage
Fizzerb is still in its infancy, but if you want to try out how it sounds, you can do so by using the following command:
$ cargo run --release
Hitting the Render button will result in a .wav sample being output to the current working directory, which corresponds to the impulse response (IR) of the simulated space. You can then convolve the IR with any sound you'd like, although don't be surprised if the results are a bit… underwhelming at the moment.