What third-party window managers are known to be fully compatible with Plasma?

From what I've seen...

Compatible
Openbox (in recent KDE 4 versions; older versions need KWin to start first and be replaced)
Xmonad (requires significant changes to the config file IIRC)

Incompatible
Fluxbox (allows the Plasma window to be moved and resized)
PekWM (ditto)
IceWM (ditto)

What other WMs are there that are compatible (or not)?

It may be worth listing this on a wiki page instead of the forum. I do know that KWin and Plasma do communicate in quite a few ways in order to operate some functionality in a clean, effective and reliable manner.