Here are the classes, structs, unions and interfaces with brief descriptions:

Nsf
CAlResource	Base class for classes that require an OpenAL context
CBlendMode	Blending modes for drawing
CCircleShape	Specialized shape representing a circle
CClock	Utility class that measures the elapsed time
CColor	Utility class for manipulating RGBA colors
CContext	Class holding a valid drawing context
CContextSettings	Structure defining the settings of the OpenGL context attached to a window
CConvexShape	Specialized shape representing a convex polygon
CDrawable	Abstract base class for objects that can be drawn to a render target
CEvent	Defines a system event and its parameters
CSizeEvent	Size events parameters (Resized)
CKeyEvent	Keyboard event parameters (KeyPressed, KeyReleased)
CTextEvent	Text event parameters (TextEntered)
CMouseMoveEvent	Mouse move event parameters (MouseMoved)
CMouseButtonEvent	Mouse buttons events parameters (MouseButtonPressed, MouseButtonReleased)
CMouseWheelEvent	Mouse wheel events parameters (MouseWheelMoved)
CMouseWheelScrollEvent	Mouse wheel events parameters (MouseWheelScrolled)
CJoystickConnectEvent	Joystick connection events parameters (JoystickConnected, JoystickDisconnected)
CJoystickMoveEvent	Joystick axis move event parameters (JoystickMoved)
CJoystickButtonEvent	Joystick buttons events parameters (JoystickButtonPressed, JoystickButtonReleased)
CTouchEvent	Touch events parameters (TouchBegan, TouchMoved, TouchEnded)
CSensorEvent	Sensor event parameters (SensorChanged)
CFileInputStream	Implementation of input stream based on a file
CFont	Class for loading and manipulating character fonts
CInfo	Holds various information about a font
CFtp	A FTP client
CResponse	Define a FTP response
CDirectoryResponse	Specialization of FTP response returning a directory
CListingResponse	Specialization of FTP response returning a filename listing
CGlResource	Base class for classes that require an OpenGL context
CGlyph	Structure describing a glyph
CHttp	A HTTP client
CRequest	Define a HTTP request
CResponse	Define a HTTP response
CImage	Class for loading, manipulating and saving images
CInputSoundFile	Provide read access to sound files
CInputStream	Abstract class for custom file input streams
CIpAddress	Encapsulate an IPv4 network address
CJoystick	Give access to the real-time state of the joysticks
CIdentification	Structure holding a joystick's identification
CKeyboard	Give access to the real-time state of the keyboard
CListener	The audio listener is the point in the scene from where all the sounds are heard
CLock	Automatic wrapper for locking and unlocking mutexes
CMemoryInputStream	Implementation of input stream based on a memory chunk
CMouse	Give access to the real-time state of the mouse
CMusic	Streamed music played from an audio file
CMutex	Blocks concurrent access to shared resources from multiple threads
CNonCopyable	Utility class that makes any derived class non-copyable
COutputSoundFile	Provide write access to sound files
CPacket	Utility class to build blocks of data to transfer over the network
CRect	Utility class for manipulating 2D axis aligned rectangles
CRectangleShape	Specialized shape representing a rectangle
CRenderStates	Define the states used for drawing to a RenderTarget
CRenderTarget	Base class for all render targets (window, texture, ...)
CRenderTexture	Target for off-screen 2D rendering into a texture
CRenderWindow	Window that can serve as a target for 2D drawing
CSensor	Give access to the real-time state of the sensors
CShader	Shader class (vertex and fragment)
CCurrentTextureType	Special type that can be passed to setParameter, and that represents the texture of the object being drawn
CShape	Base class for textured shapes with outline
CSocket	Base class for all the socket types
CSocketSelector	Multiplexer that allows to read from multiple sockets
CSound	Regular sound that can be played in the audio environment
CSoundBuffer	Storage for audio samples defining a sound
CSoundBufferRecorder	Specialized SoundRecorder which stores the captured audio data into a sound buffer
CSoundFileFactory	Manages and instantiates sound file readers and writers
CSoundFileReader	Abstract base class for sound file decoding
CInfo	Structure holding the audio properties of a sound file
CSoundFileWriter	Abstract base class for sound file encoding
CSoundRecorder	Abstract base class for capturing sound data
CSoundSource	Base class defining a sound's properties
CSoundStream	Abstract base class for streamed audio sources
CChunk	Structure defining a chunk of audio data to stream
CSprite	Drawable representation of a texture, with its own transformations, color, etc
CString	Utility string class that automatically handles conversions between types and encodings
CTcpListener	Socket that listens to new TCP connections
CTcpSocket	Specialized socket using the TCP protocol
CText	Graphical text that can be drawn to a render target
CTexture	Image living on the graphics card that can be used for drawing
CThread	Utility class to manipulate threads
CThreadLocal	Defines variables with thread-local storage
CThreadLocalPtr	Pointer to a thread-local variable
CTime	Represents a time value
CTouch	Give access to the real-time state of the touches
CTransform	Define a 3x3 transform matrix
CTransformable	Decomposed transform defined by a position, a rotation and a scale
CUdpSocket	Specialized socket using the UDP protocol
CUtf	Utility class providing generic functions for UTF conversions
CUtf< 16 >	Specialization of the Utf template for UTF-16
CUtf< 32 >	Specialization of the Utf template for UTF-32
CUtf< 8 >	Specialization of the Utf template for UTF-8
CVector2	Utility template class for manipulating 2-dimensional vectors
CVector3	Utility template class for manipulating 3-dimensional vectors
CVertex	Define a point with color and texture coordinates
CVertexArray	Define a set of one or more 2D primitives
CVideoMode	VideoMode defines a video mode (width, height, bpp)
CView	2D camera that defines what region is shown on screen
CWindow	Window that serves as a target for OpenGL rendering
CFileInputStream	This class is a specialization of InputStream that reads from a file on disk
CMemoryeInputStream	This class is a specialization of InputStream that reads from data in memory