The last version of DOS I used before upgrading to Windows 3.1 was 6.22. I wonder where this one came from, but it totally kicks ass:
It’s totally beefed up, has multimedia support (read: MP3′s and videos on DOS), comes with Microsoft Anti-Virus (read: erase those DOS viruses now), is GPL (read: not a genuine Microsoft product), and comes with a totally awesome bootsplash!
The best part is… you know how Linux has these live CD distros? Well DOS 7.10 goes farther — live floppy with Windows 3.11 window manager O.o
It’s awesome because it packs some nifty tools, and supports Windows 95 and Windows 98.