KDE And Gnome Cooperate On Interface Guidelines
An anonymous reader submits "Competing infrastructures may foster improvement in each desktop, but the Gnome and KDE hackers still know how to work together when needed. The Free *nix desktop has been improving quickly. Red Hat's unified desktop was controversial, but obviously the right decision for regular users. Now that KDE and Gnome have decided to combine their Human Interface Guides, it can be done right--by the developers themselves. Note: they also want to involve 'people working on other non-KDE non-GNOME HIGs.'" Update: 02/03 20:19 GMT by T : Apparently not everyone's browser can read http://freedesktop.org, so the initial link up there now sports a "www" as well. And it's .org -- sorry.
http://www.freedesktop.org/ works.
... the longest-used, most consistently enforced set of user interface guidelines in the industry for some ideas.
To a Lisp hacker, XML is S-expressions in drag.