Comment 39 for bug 974480

Except some "old school" cooperate software that mentioned somebody else.

What about IBus, the default input method framework of Ubuntu.

It doesn't support AppIndicator yet.
On the other hand, it's the Ubuntu specific have half-broken patch make it play with Ubuntu.
http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/raring/ibus/raring/view/head:/debian/patches/05_appindicator.patch

Why I say it is half broken?
It doesn't show input method specific context menu as upstream tray icon.
It has bug like: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1023165

Another ugly thing is what if the manually compile ibus?
We have 1.4.2 for Raring.
What if the user try to compile latest 1.5.1 herself? Not usable in Unity?
1.5.x is not introduced in Raring for some reasons, but particular user may have different opinion.