These functions were not documented in the original helpfile. I have explained most of them in this guide, but for a few the uses are still unknown to me. I thought it might be useful to have as a list for an easy overview. The list was put together by someone who Hex-edited the TES-CS .exe, so it's likely to be complete.
(thanks to Soralis for the list and XPCagey and others who helped to put it together):
Undocumented in Helpfile:
PayFineThief
EnableStatReviewMenu
GetFactionReaction
ShowMap
EnableBirthMenu
EnableClassMenu
EnableRaceMenu
EnableNameMenu
RemoveEffects
EnableMagicMenu
EnableMapMenu
EnableInventoryMenu
EnableStatsMenu
GetInterior
GetLineOfSight (alias for GetLOS)
GetWindSpeed
GetCurrentTime
ResetActors
OutputRefInfo
MenuTest
Functions which are spelled differently than documented (XPCagey):
getHealthRatio -> getHealthGetRatio
getInvisible -> getInvisibile
setInvisible -> setInvisibile
modInvisible -> modInvisibile
getSecundusPhase -> getSecundaPhase
(actual syntax on the right)
And those which don't work:
getPlayerViewSwitch -> (can't be used)
OnRepair -> not in string tables
UsedOnMe -> not in string tables
name -> not in string tables
Also be aware that most console commands can be compiled as functions by the Construction Set (see list below). These are also to a large part not listed by the helpfile.