Looks ridiculous, but I can't find Ambience theme for XFCE out the in the Internet (while there are even couple of pretty good versions for Windows XP). Could you share a link? I even don't require everything (like controls and icons) look exactly like it does in original Ubuntu Ambiance, I just want window decorations (better with controls on the right though) and a colours scheme (for example dark menu bars instead of default blue ones).
PS: I'd prefer not to install Gnome and Metacity.
I just made a theme that imitate exactly Ambiance theme used in Ubuntu, and built for Xubuntu. Check it out: http://xfce-look.org/content/show.php?content=141027
I recently stumbled upon the best XFCE/LXDE versions of Ambiance and Radiance I've seen yet, put together by the RAVEfinity team. You can check them out at xfce-look:
http://xfce-look.org/content/show.php/Ambiance+%26+Radiance+Themes+for+Xfce%2BOpen?content=146674
For the impatient, they can be installed thusly:
They look great and I haven't run into any of the bugs or oddities I've seen with the other Ambiance/Radiance knockoffs. They also provide some interesting "colored" versions of Ambiance and Radiance (which I haven't tried yet):
http://xfce-look.org/content/show.php/Ambiance+%26+Radiance+Colors+Version?content=147891
have you checked out xfce-look.org? It has a lot of themes for you to choose from.
A few Ambiance themes are found here:
Ambiance Redefined III
Ambiance Elegancy
Most of the themes (including those two above) use GTK. You can sort through the KFCE themes on kfce-look.org though. Here are some similar to the Ambiance theme, though they aren't the same:
Axiom
Shiki Colors
After 12.10 (quantal) the Ravefinity PPA has not been updated. But as of 14.04 (trusty), one can get their current Xfce Ambiance and Radiance themes from their website.