http://www.hacksrus.com/~ginda/xulkit/doc/
    http://xulfr.org/outils/


http://docs.mandragor.org/files/Misc/Mozilla_applications_en/

http://developer-test.mozilla.org/en/docs/XUL_Tutorial

http://www.xulplanet.com/downloads/xpimaker/

http://portal.wikinerds.org/firefox-extensions

http://xul-app.hp.infoseek.co.jp/xultu-janit/