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.