Instant Meshes is an open source Quad Remesher that works incredibly well.
In this video we cover a way to call Instant Meshes from inside Houdini and use it on a normal workflow.
You will need to download the Instant Meshes executable and place it in your houdini16.0 directory, or select a custom path as shown in the video.
Feel free to leave your opinion in the comments!
You can download the HDA from the Games Tools Github Page along with the rest of the Game Development Toolset