DiscreteMath`IntegerPartitions` was available as an add-on package in previous versions of Mathematica and is now available on the web at ...
Geometry`Polytopes` functionality is available in the kernel function PolyhedronData.
ArgColor, ArgShade and ColorCircle are obsolete, with simple definitions in terms of system functions.
Color names are available in the new kernel function ColorData.
The new two-parameter form of ParametricPlot now provides the functionality of Graphics`ComplexMap`.
As of Version 7, the Histograms Package has been integrated into the Mathematica kernel.
Much of the functionality in Miscellaneous`CityData` is now available in the built-in Mathematica kernel function CityData.
All the functionality in Miscellaneous`WorldData` is now available in the built-in Mathematica kernel function CountryData.