Michael Willes has released Dragonfly Reverb, a free reverb effect plugin based on reeverb3 algorithms.
Dragonfly Reverb is a concert hall style reverb intended for acoustic instruments and vocals.
For anybody who has used Hibiki Reverb, this is built on the same algorithms, so much to the extent that you can consider it almost the same plugin, but with a new user interface that is hopefully much easier to use.
The plugin is available from Github. It is available for Windows, Mac and Linux, with both binaries and source code available.
More information: Dragonfly Reverb