Translation Editor with TM support

Has anyone successfully used a (free) translation memory based
translation editor with DocBook. I'm observing now OmegaT for quite a
long time, but it seems that support for DocBook is not on their
priority list. Found today another candidate called
"open-language-tools" at https://open-language-tools.dev.java.net. At
least it comes with DocBook filters. Any experience with it, or are
there other valuable tools out there?

Thanks,
Georges