Google Glass is very much an experimental piece of hardware and it turns out the software has been built with that ethos in mind, too. With root and a few carefully-crafted ADB commands, you can enable a ton of experimental features the Google has built into the Glass software.
Over on Github, Zhuowei Zhang has posted the whole list of Glass Labs features, and how to enable them. Zhuowei isn't a Glass explorer though, so it's been up to me to be the guinea pig and actually try this stuff.
Check these out:
Code:
AUTO_SHARE_TARGETS("AUTO_SHARE_TARGETS", 26, false),
BLUETOOTH_HEADSET("BLUETOOTH_HEADSET", 10, true),
CALL_NOISE_CANCEL("CALL_NOISE_CANCEL", 25, false),
CLIPLET("CLIPLET", 4, false),
COMPANION_API("COMPANION_API", 35, false),
DEBUG_LAUNCHER("DEBUG_LAUNCHER", 11, false),
DEV_SERVERS("DEV_SERVERS", 18, false),
DING_ON_LOAD("DING_ON_LOAD", 31, false),
DISABLE_GAZE_ON_MIC("DISABLE_GAZE_ON_MIC", 32, true),
GCAM("GCAM", 0, false),
GPS_DEBUG_CARD("GPS_DEBUG_CARD", 20, false),
GPS_IN_BACKGROUND("GPS_IN_BACKGROUND", 21, false),
HO_BG_WAITING("HO_BG_WAITING", 5, false),
HO_USE_SVC("HO_USE_SVC", 3, true),
KANNADI_DEV_SERVER("KANNADI_DEV_SERVER", 14, false),
LOG_NEG_SENSORY_REC("LOG_NEG_SENSORY_REC", 8, false),
LOG_POS_SENSORY_REC("LOG_POS_SENSORY_REC", 7, true),
LONG_TAP_TO_SEARCH("LONG_TAP_TO_SEARCH", 33, true),
LONG_TAP_UI_SEARCH("LONG_TAP_UI_SEARCH", 34, true),
NATIVE_APP_VOICE("NATIVE_APP_VOICE", 28, false),
NAV_CONTAMINATE_FIX("NAV_CONTAMINATE_FIX", 42, false),
NAV_NO_COMPANION("NAV_NO_COMPANION", 23, true),
NAV_USE_LOCAL_GPS("NAV_USE_LOCAL_GPS", 22, false),
OK_GLASS_EVERYWHERE("OK_GLASS_EVERYWHERE", 24, false),
PHONE_AEC_LOG("PHONE_AEC_LOG", 41, false),
PRODUCTION_SERVERS("PRODUCTION_SERVERS", 15, true),
QUICK_QR_CODE("QUICK_QR_CODE", 36, false),
SAVE_AUDIO("SAVE_AUDIO", 6, false),
SEARCH_DEV_SERVER("SEARCH_DEV_SERVER", 12, false),
SEARCH_FEEDBACK("SEARCH_FEEDBACK", 9, false),
SEARCH_GWS_FLOW("SEARCH_GWS_FLOW", 40, false),
SEARCH_TEST_SERVER("SEARCH_TEST_SERVER", 13, false),
SHORT_TIMELINE_POLL("SHORT_TIMELINE_POLL", 38, false),
SMS_FROM_VOICE_MENU("SMS_FROM_VOICE_MENU", 29, true),
STAGING_SERVERS("STAGING_SERVERS", 16, false),
TESTING_SERVERS("TESTING_SERVERS", 17, true),
THIRD_PARTY_VOICE("THIRD_PARTY_VOICE", 27, false),
TOUCH_VOICE_MENU("TOUCH_VOICE_MENU", 39, false),
UPLOAD_SESSION_MNGR("UPLOAD_SESSION_MNGR", 19, false),
VSTAB("VSTAB", 1, false),
VSTAB_CALIBRATION("VSTAB_CALIBRATION", 2, false),
WEB_BROWSING("WEB_BROWSING", 30, false),
WINK("WINK", 37, false);
More at Android Police

--jeremy