Written by CKS - This neat little demo type utility builds a scroll routine for you. You enter text you want scrolled in your program and it creates an ML routing that can be SYS'd for you to use in your programs.

Here is something everybody needs;  a program to create random 10 digit passwords that include both alpha and numeric characters.  To bad it doesn't have an option to add punctuation or lower case.  

This program will read the DOS from a floppy drive at $8000 - $FFFF and put it in ram at $2000 - $9FFF and then write it to a file.  Also works with CMD FD-2000 and FD-4000.

Recover 1581 (from Steve's Helper Disk) is a utility for recovering a scratched file.  This program will also work on other drives besides the 1581.

SD2IEC Wedge 64 v23.01 by DiscMix - This is a pretty cool DOS wedge for SD2IEC devices that can be loaded into $C000 or $9000 providing many useful commands for working with files, directories and more.

Here is a link to the  authors site (https://sw64.mrys.de/) where the latest version can be downloaded and documentation can be found.  There is also a text file in the archive with documentation.

I'm sure someone out there would find this utility useful.  basically it lets you show or print out the internal code of the PLA chip.  Brought to you by Near Letter Quantity software. 

String Finder - searches through the disk for any occurrences of a specified string.  this is the uncompiled version of "disk $finder".  written in basic, it would allow for changes in the starting track, etc.

Super Directory released in 1984 by PSIDAC - Neat tool that will analyze all the files on a disk and give you the starting track and sector of each with the option to send the results to a printer.

SuperLock 64 is a utility that can be used to lock a disk so that it can't be written to.  You can still read and copy from the disk, but short of reformatting the disk you won't be able to write to it again.

Found this character editor for the Commodore 64 game The Bard's Tale - Wish I had this when I was a kid, but kind of glad I didn't now.

Track Copy by E. Steiner was released in 1986.  You can copy tracks 1 - 42 and need to know how to read a little German.

Two Drive 1541 - from the Transactor, 9/85. Most commands for device #8, drive #1 are re-directed to device #9 by this small ml routine located in the cassette buffer.

Ultdir2.gen by Kurt Brandon / Bob Kober - You know how sometimes you run across a program and  it has nice documentation and seems to work great but you can't figure out what in the world it would be used for?  Well this is one of those programs.  I was recovering files from an old CompuServ archive where I found this, and because I spent a good 20 minutes stripping the header off some obscure format CompuServ used for storing files I figured I'd post this in hopes that someone finds it useful and/or wants to explain what it would be used for.  Honest, I did RTFM and there is even some example code in the docs, but it just isn't sinking in.  Anyway, here is a quote from the docs describing the program:

This program will write to disk a 7-block object program that,  when invoked with a SYS command from BASIC, will display a directory identical to that possesed by Bob Kober's great ULTRA sequential file reader/printer.

If anyone wants to ELI5 to me, please hit the "Contact Us" link and I'll update this description.

Unscratch is a simple utility that lets you recover deleted files.

Virtual Directory by Robert E. Mason is a utility for the Commodore 64 or Commodore 128 in 40/80 column mode that will analyze the files on a disk and present you with information such as the file type, load address, starting track and sector and block size.

Written by Will Corley, Zeek 1541 is a full text search.  Works on Seq and Prg files.