More than you can shake a stick at.

Array
ArrayBuffer
AutoreleasingUnsafePointer
Bool
CConstPointer
CConstVoidPointer 
CMutablePointer
CMutableVoidPointer 
COpaquePointer 
CString 
CVaListPointer
CollectionOfOne
ContiguousArray
ContiguousArrayBuffer
Dictionary
Double
EmptyCollection
EmptyGenerator
EnumerateGenerator
FilterCollectionView
FilterCollectionViewIndex
FilterGenerator
FilterSequenceView
Float
Float80
GeneratorOf
GeneratorOfOne
GeneratorSequence
HeapBuffer
ImplicitlyUnwrappedOptional
IndexingGenerator
Int 
Int16 
Int32 
Int64 
Int8 
IntEncoder 
Less
MapCollectionView
MapSequenceGenerator
MapSequenceView
ObjectIdentifier 
OnHeap
PermutationGenerator
Range
RangeGenerator
RawByte
Repeat
ReverseIndex
ReverseRange
ReverseRangeGenerator
ReverseView
SequenceOf
SinkOf
Slice
SliceBuffer
StaticString 
StridedRangeGenerator
String
UInt 
UInt16 
UInt32 
UInt64 
UInt8 
UTF16 
UTF32 
UTF8 
UnicodeScalar 
Unmanaged
UnsafeArray
UnsafePointer
Zip2
ZipGenerator2