*#*#8255#*#* -> Google Talk Service Monitor (Talk.apk)
*#*#4636#*#* -> Testing / Debug info (Settings.apk)
*#*#9696#*#* -> FTP Testing / App (Ftp.apk)
*#*#8351#*#* -> *#*#VDL1#*#* Voice Dialer Logging Enabled (VoiceDialer.apk)
*#*#8350#*#* -> *#*#VDL0#*#* Voice Dialer Logging Disabled (VoiceDialer.apk)
*#*#7269#*#* -> Standard device logging (Device [logcat?], AT commands, Kernel [dmesg?], and optional log to flash memory) (HtcLog.apk)
*#*#564#*#* -> QXDM Logging Front end (QxdmLog.apk)