XML plugins for Eclipse

I'm looking for a good, GPL'ed (or CPL'ed) XML eclipse plugin.

First, I tried SolarEclipse, but didn't like it because it couldn't save a simple modified xml.

Then (after uninstall SolarEclipse), I tried X-men. It simply didn't show his face up to me :(

After, I decided to experiment black-sun and it's XML editor seems to be okay, althought somebody has written that its unstable.