Houdini 12.5, Nuke, (some Modo 601.) Rendered in Mantra (PBR mode), comp in Nuke.
Wood-board is a pre-fractured piece of geometry glued together in a DOP-network. For various reasons I used an actual object to do the breaking instead of an invisible force. I wanted to use the Bullet-solver but it wasn't stable enough (or I am too incompetent :)), ended up using Houdini's own RDB-solver.
Most of the smoke and particles are emitted from the moving pieces of the board (ergo, the debris) which is really simple to setup in Houdini. The smoke solver performed admirably as always.
I got pretty good results from Mantra too, it wasn't exactly Arnold-quick, but it was a pretty nice experience.