LoopLinux: Small Linux OS distribution that can install and run on DOS/Win systems: DR-DOS, MS-DOS, PC-DOS, PTS-DOS, DOS mode Win95/98. No need to repartition, it is only a file on the disk, and acts like it is on its own partition. Not a UMS-DOS system, but a loop system using standard Linux ext2 filesystem.
Monkey: Mini Linux: Can be extracted to DOS filesystem, and FAT32 too. Full small ELF distribution with latest kernel on 5 diskettes. Can run on this minimal HW: 386SX, 4MB RAM, 30MB on IDE HDD. Contains X Windows for any SVGA videocard, support for: network, 3C5x9, 3c59x, 3c900, NE2000/NE1000, WD80x3 ethernet cards, ATAPI/MITSUMI CD.
University Linux: A small, full-featured Linux distribution that installs easily on a DOS or Win9x PC without partitioning the hard drive. Includes webserver, FTP and Telnet servers as well as Perl and complete tutorials.
Unofficial Monkey Linux Web Site: Documents use of the UMSDOS-based Monkey Linux mini-distribution.