DialogSymbols is an option for Dialog which gives a list of symbols whose values should be localized in the dialog.
DifferentialD[x] displays as \[DifferentialD]x.
DisplayFunction is an option for graphics and sound functions that specifies a function to apply to graphics and sound objects before returning them.
DragAndDrop is a global front end option that specifies whether to allow drag-and-drop editing.
EdgeStyle is an option and property for Graph and related functions that specifies what style to use for edges.
ExcludePods is an option to WolframAlpha that specifies pod IDs to exclude from the results.
ExponentialMovingAverage[list, \[Alpha]] gives the exponential moving average of list with smoothing constant \[Alpha].
FieldHint is an option for InputField that specifies contents to display when the input field is empty.
FileNameSetter[name] represents a file name setter which displays as a Browse button and when clicked brings up a system file opening dialog, starting from the location ...
FindGeoLocation[] attempts to find the current geodetic location of your computer.