x11-apps is for X.org apps.
commit c42fbbf994bdfd2e86b3741aab20344a5b4adfdc Author: Sergey Popov <pinkbyte@gentoo.org> Date: Fri Jan 29 14:18:18 2016 +0300 Move x11-apps/ardesia to x11-misc/ardesia Gentoo-Bug: 571830