Software
Free DOS
Free DOS distribution
Euphoria -- A very interesting new interpreted programming language
DJGPP - a free (under gnu-license) 32 bit C/C++ compiler.
TMT 32 bit Pascal compilers (also for OS/2)
FDISK.COM - Dos Internet Pages (Includes DOS browser links)
Arachne A DOS based web browser.
NuMega, the makers of Bounds Checker and Soft-ICE
DOSEMU The Dos box for Linux users.
UPX The ultimate .EXE packer.
The valuable DOS freeware page
SuperAnt Small Computing
Sudley Place Software
Free Basic Compilers.
Early Borland Turbo compilers for free!
Free Software for DOS
CauseWay DOS extender (includes source!)
Triple Dos (DOS Multitasker)
PDOS (public domain DOS)
DOS Solutions
Interesting DOS programs
Qube (portable GUI)
SEAL -- A desktop environment (Alternate site)
Programming, etc
Pentium Optimizations by Agner Fog
Data resources for DOS programs
X2FTP The de facto standard PC demo and game programming ftp site.
PC-Game Programmers Encyclopedia on the web
Ralph Brown's interrupt list
Interrupt Services DOS, BIOS, EMS und Mouse (German)
WOTSIT File types with detailed descriptions
DEBUG.COM tutorial
Documenting config.sys
Watt-32 tcp/ip Homepage
Direct DOS Timer reprogramming
DOS DIR clone sources
DOS FC clone sources
Description of PC ports
CDROM programming FAQ
Tom Lavedas' Batch File Utilities
MS-DOS Batch programming
Batch file tricks
Rob van der Woude's Batch file resources
VESA Super VGA routines (assembly language)
Jim Webster's Assembly Language Help and Programming Home page
DPMI 0.9 spec online. (provided by tenberry)
DPMI 1.0 spec online. (provided by D.J. Delorie)
Programming MS-DOS with Power
DJGPP and related links
Programming Floppy Disk Controllers
Visicalc
Misc
The Kingdom of DOS-a-lot by Carlos DaSilva
An Inside Look at MS-DOS by Tim Patterson (the creater of PC/MSDOS)
The history of DOS and Windows