linuxmint/Cinnamon — pull request #1051 by mtwebster (2012-08-25 00:10:37+00:00)
Title: Add "Close all" and "Close others" to window-list applet's context menu.

My only concern with this would be causing a race condition of some sort with array sizes.

In my testing, however, I didn't seem to run into any issues - I'll keep messing around with it to see if I can break it.