Plan 9 from User Space - Screen Shots
acme(1) editor, showing off Unicode capabilities | sam(1) editor, showing off Unicode capabilities | rio(1) window manager, running acme(1), 9term(1), Mozilla Firebird (sic), and Mozilla Thunderbird. | Mac OS X desktop runing acme(1) and man(1) (PS in Preview)
Mac OS X desktop runing acme(1) and man(1) (HTML in Firefox) | OpenSolaris desktop runing acme(1) and 9term(1) (Thanks to Mon de Vera) | OpenBSD 3.8 runing acme(1), stats(1), and rio(1), with a few non-Plan 9 programs. (Thanks to Luiz Gustavo)