HelenOS sources

KC_F11            146 uspace/drv/hid/adb-kbd/ctl.c 	[0x67] = KC_F11,
KC_F11            139 uspace/drv/hid/atkbd/atkbd.c 	[0x78] = KC_F11,
KC_F11            116 uspace/drv/hid/usbhid/kbd/conv.c 	[0x44] = KC_F11,
KC_F11            131 uspace/drv/hid/xtkbd/xtkbd.c 	[0x57] = KC_F11,
KC_F11            911 uspace/lib/vt/src/vt100.c 		vt100_key(vt, 0, KC_F11, 0);
KC_F11            212 uspace/srv/hid/input/ctl/stty.c 	0,	KC_F11,		0x1b, 0x5b, 0x32, 0x33, 0x7e, GSP_END,
KC_F11            107 uspace/srv/hid/input/ctl/sun.c 	[0x09] = KC_F11,
HelenOS homepage, sources at GitHub