I released a new engine for playing chess with piece drops last week. It can play Crazyhouse, Shogi, mini-Shogi, Judkins' Shogi, Tori Shogi and Wa Shogi. I called it CrazyWa. In Crazyhouse bullet games it is about as strong as Sunsetter 7g.
A Windows binary of it can be downloaded from http://hgm.nubati.net/CrazyWa-1.0.2.exe .
It can run under WinBoard, and for people who want to have a product that is ready to run 'out of the box', I also put it in the package with the beta test version of WinBoard ( http://hgm.nubati.net/WinBoard=AA.zip ).