Output from maya.api.OpenMaya.MEventMessage.getEventNames(), as of Maya 2015
linearUnitChanged
timeUnitChanged
angularUnitChanged
Undo
undoSupressed
Redo
timeChanged
currentContainerChange
quitApplication
idleHigh
idle
RecentCommandChanged
ToolChanged
PostToolChanged
ToolDirtyChanged
DisplayRGBColorChanged
animLayerRebuild
animLayerRefresh
animLayerAnimationChanged
animLayerLockChanged
animLayerBaseLockChanged
animLayerGhostChanged
cameraChange
cameraDisplayAttributesChange
SelectionChanged
LiveListChanged
ActiveViewChanged
SelectModeChanged
SelectTypeChanged
SelectPreferenceChanged
DisplayPreferenceChanged
DagObjectCreated
renderLayerManagerChange
renderLayerChange
displayLayerManagerChange
displayLayerAdded
displayLayerDeleted
displayLayerVisibilityChanged
displayLayerChange
renderPassChange
renderPassSetChange
renderPassSetMembershipChange
passContributionMapChange
DisplayColorChanged
lightLinkingChanged
lightLinkingChangedNonSG
UvTileProxyDirtyChangeTrigger
polyTopoSymmetryValidChanged
SceneSegmentChanged
PostSceneSegmentChanged
SequencerActiveShotChanged
ColorIndexChanged
deleteAll
NameChanged
symmetricModellingOptionsChanged
softSelectOptionsChanged
SetModified
linearToleranceChanged
angularToleranceChanged
nurbsToPolygonsPrefsChanged
nurbsCurveRebuildPrefsChanged
constructionHistoryChanged
threadCountChanged
SceneSaved
NewSceneOpened
SceneOpened
SceneImported
PreFileNewOrOpened
PostSceneRead
workspaceChanged
selectionConstraintsChanged
startColorPerVertexTool
stopColorPerVertexTool
start3dPaintTool
stop3dPaintTool
DragRelease
ModelPanelSetFocus
modelEditorChanged
MenuModeChanged
gridDisplayChanged
interactionStyleChanged
axisAtOriginChanged
CurveRGBColorChanged
SelectPriorityChanged
snapModeChanged
nurbsToSubdivPrefsChanged
ChannelBoxLabelSelected
selectionPipelineChanged
playbackRangeChanged
playbackRangeSliderChanged
currentSoundNodeChanged
glFrameTrigger
RebuildUIValues