LFNDOS v1.06 (23k) - Provides the Windows 95 long filename API to DOS programs. 
WARNING: LFNDOS is an old program now, it was written over 3 years ago and may not work properly with today's large hard drives. If in doubt, don't use it.
Any DOS program which can use long filenames, for example DOS 7 Command.com, edit.com and all DJGPP programs, can load and save using them with LFNDOS. Designed for Win95 users using DOS-mode, although it works under old DOS versions too! C++ source code (122k) now available!

NetCopy v0.2 (40k) - Peer-to-peer file transfer over a DOS IPX network. Fed up with loading Windows just to copy a file? Here's your solution. Also supports serial cable transfers. Also supports bulk-sending of a file to up to 7 other people on the network at once.

WinEm v1.00 (154k) - Allows you to run Win32 (R) console applications from DOS. Not particularly useful, but it does let you use stuff like XCOPY32 from plain DOS. And, developers: you can write console-mode applications which will run natively in Win95/98/NT and also in DOS. DJGPP source code (45k) available.

ADIR v1.05 (18k) - Like the normal DIR command, but shows long filenames - even when Windows isn't loaded! Works with Win95 in DOS mode, and old DOS versions. Now superseded by LFNDOS, but if you don't have Win95 or any LFN-aware programs, then this program will let you view long filenames on, for example, a disk from a friend.

DOS FAQ (8k) - This is a FAQ list of commonly asked questions by people new to DOS or who have been away from it for a while. It covers from how to view a list of files (DIR) up to creating and removing directories. Not for the experienced DOSser!

DOS Utilities not written by me

ShowText by Dave Sherriff (6k) - Displays all the ASCII text in a binary (eg. EXE) file. This is useful if you want to see all the text stored in the file, or if you're just generally interested

DDL v1.03 by P.Frost (4k) - An incredibly useful utility which allows you to load DOS device drivers from the command line, without having to reboot. I use it to load my CD-ROM driver only when I need it, which saves memory the rest of the time. Almost eliminates the need for a config.sys!