FYI, The Cinema4D and Houdini plugins have been released few days ago.The Houdini plugin is directly integrated in the gamedev/"SideFX Labs" as explained here : https://www.sidefx.com/tutorials/sidefx-labs-exoside-quadremesher/
I started the dev on both Houdini and Blender.(with help of yursiv for Blender, Thanks!)I want to focus on releasing the 1st version for Maya, 3DS and modo first.And just after, I will continue the dev for Blender and Houdini ... (I hope in 1 month)
This is high on my wishlist in Houdini, I hope you'll consider branching out. Zremesher is great for organics, but hasn't been ideal for hard surface retopo, is this something that can be addressed this time around?