A collection of utilities to access MS-DOS disks from Unix without mounting them. Supports Win'95 style long file names, OS/2 Xdf disks and 2m disks. With source code. http://mtools.linux.lu/index.html
Hierarchical File System is the native volume format used on modern Macintosh computers. Hfsutils is a comprehensive software package being developed to permit manipulation of HFS volumes from UNIX and other systems. http://www.mars.org/home/rob/proj/hfs/
Open Source WindowsNT and Linux file system software. Ntifs.h, Ext2fs_Rec NT Ext2 file system recognizer, SwapFs NT driver to use Linux swap partition, FileDisk is a virtual disk driver for NT that uses files to emulate physical disks. http://www.acc.umu.se/~bosse/