The X68k ran an operating system developed for Sharp by Hudson Soft, called Human68k, which features commands very similar to those in MS-DOS (typed in English). Pre-2.0 versions of the OS had command line output only for common utilities like 'format' and 'switch' while later versions included forms-based versions of these utilities, greatly improving their usability. At least three major versions of the OS were released, with several updates in between. Other operating systems available include NetBSD for X68030 and OS-9.
Early models had a GUI called "VS" (Visual Shell); later ones were packaged with SX-WINDOW. A third GUI called Ko-Windows existed; its interface is similar to Motif. These GUI shells could be booted from floppy disk or the system's hard drive. Most games also booted and ran from floppy disk; some were hard disk installable and others require hard disk installation.
Since the system's release, Human68k, console, and SX-Window C compiler suites and BIOS ROMs have been released as public domain and are freely available for download." (Wikipedia)
Download Sharp X68000 - Applications (TOSEC-v2006-04-22) from Megaupload: