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

ArduinoInStream | Input stream for Arduino Stream objects
ArduinoOutStream | Output stream for Arduino Print objects
BaseBlockDriver | Base block driver
biosParmBlock | BIOS parameter block
cache_t | Cache for an raw data block
directoryEntry | FAT short directory entry
fat32_boot | Boot sector for a FAT32 volume
fat32_fsinfo | FSINFO sector for a FAT32 volume
fat_boot | Boot sector for a FAT12/FAT16 volume
FatCache | Block cache
FatFile | Basic file class
FatFileSystem | Integration class for the FatLib library
FatPos_t | Internal type for file position - do not use in user apps
FatStreamBase | Base class for C++ style streams
FatVolume | Access FAT16 and FAT32 volumes on raw file devices
File | Arduino SD.h style File API
fname_t | Internal type for Short File Name - do not use in user apps
fstream | File input/output stream
ibufstream | Parse a char string
ifstream | File input stream
ios | Error and state information for all streams
ios_base | Base class for all streams
iostream | Input/Output stream
istream | Input Stream
longDirectoryEntry | FAT long directory entry
masterBootRecord | Master Boot Record
MinimumSerial | Mini serial class for the SdFat library
obufstream | Format a char string
ofstream | File output stream
ostream | Output Stream
partitionTable | MBR partition table entry
PrintFile | FatFile with Print
Sd2Card | Raw access to SD and SDHC card using default SPI library
SdBaseFile | Class for backward compatibility
SdFat | Main file system class for SdFat library
SdFatEX | SdFat class with extended SD I/O
SdFatSdio | SdFat class using SDIO
SdFatSdioEX | SdFat class using SDIO
SdFatSoftSpi | SdFat class using software SPI
SdFatSoftSpiEX | SdFat class using software SPI and extended SD I/O
SdFile | Class for backward compatibility
SdFileSystem | Virtual base class for SdFat library
SdioCard | Raw SDIO access to SD and SDHC flash memory cards
SdioCardEX | Extended SD I/O block driver
SdSpiCard | Raw access to SD and SDHC flash memory cards via SPI protocol
SdSpiCardEX | Extended SD I/O block driver
setfill | Type for setfill manipulator
setprecision | Type for setprecision manipulator
setw | Type for setw manipulator
StdioStream | StdioStream implements a minimal stdio stream
SysCall | SysCall - Class to wrap system calls