Excerpt from the mtools Web Page:
Mtools is a collection of utilities to access MS-DOS disks from Unix without mounting them.
Programs like PCDISK (included in the PATHWORKS and Advanced Server products) and MGPCX exist for VMS, and they may be used to work with DOS-format (floppy) diskettes. Mtools extends this capability to other media with greater capacity, such as Iomega Zip disks and USB flash storage devices, plus disk image files.
Note that support for extended file names on ODS5 file systems depends on fairly recent C RTL features, as found in VMS V7.3-2 or VMS V7.3-1 with VMS731_ACRTL V3.0.
The Zip archive for this kit was created using the Zip "-V" option to preserve the VMS file attributes, but the source files in this Zip archive should be usable on a non-VMS system. The VMS port notes mentioned above (and included in the kit) describe how to restore the original mixed-case and/or multi-dot file names in the kit which have been altered to accomodate the more limited VMS ODS2 file system where this work was done.
All versions of mtools for VMS, including older and experimental ones, may be found at the archive: /ftp/mtools/
FTP access is also available at: ftp://ftp.antinode.info/mtools/