Filesystem in Userspace, also known as FUSE, is the original name for this Unix tool that lets a user without user privileges to create a virtual file system within any application.
The combined use of MacFuse with other programs lets you carry out tasks that, up till now, were not allowed on Mac OS X, such as, for example: to write on a NTFS-3G (the Windows file system) disk partition.
Other operating systems which MacFUSE is compatible with include: ftpfs (FTP read/write), wdfs (WebDAV), cryptofs, encfs, bindfs, etc.
For Mac OS X 10.5 and above. Mac OS X Tiger (10.4) users should use MacFUSE 1.7.0.