1541 File Unscratcher is a simple utility to recover a deleted file.  This program is from the appendix of the 1541 users guide.

This program lets you create subpartitions (aka. subdirectories) on your 1581, or compatible drive.  This program works with a C64 or C128 computer.

Note:  Although this is originaly a CMD utility, it was modified by Adam Vardy to make it easier to use and more reliable.

This little program will let you read the back side of a 1541 formatted floppy in a 1571 drive without flipping the disk.  Not sure why you'd want to do this since you can't read tracks 1-4 but the code might prove useful to someone.

Not much information on this 80 column program. It looks good but eats up a significant amount of BASIC memory.

80 Columns for the Commodore 64 by Gregg Peele and Kevin Martin - A utility / demo of the Commodore 64 as it would look if it have an 80 column display.  Kind of neat to write some simple BASIC programs that can take advantage of the extra columns.  Just be sure to do a "NEW" command before starting your BASIC coding and you'll have 26,627 bytes of space to work with.

Found this utility recently for working in 80 columns on a Commodore 64.  There are several other utilities out there that do the same things, but heck, what can one more hurt?

Written in 2004 by Christopher Magro the Maltese. 80 Columns is a nice implementation of an 80 column interface for the C64 leaving all of BASIC memory useable.

Written by Will Corley, Anal 1541 is a character frequency analyzer.  You pick a file on a disk and it will scan through it and tell you how often a particular character occurs in the file.

This handy utility will convert and ASCII file to PETSCII.

I know this isn't a utility to everyone, but it does have a utilitarian purpose and I love BT3 so I'm including it.

This handy utility will convert a PETSCII file to ASCII.

Cartridge Cloner - This is a simple little program that will dump the contents of a cartridge into a savable form in memory.  Don't think I'd recommend using this as you have to plug the cartridge in after the power is on and the dumper loaded.

CBM Disk Transfer Benchmark 1.0 by Obliteratir918/Strate is a tool for seeing just how fast / slow your storage device is.  For the latest version and extra information about the program and some interesting benchmarks go to the official website - www.obliterator918.com/dtb

CBMMark is a benchmarking suite for the C64 and C128 computers. CBMMark can analyze the performance of any kernel compliant drive. CBMMark performs tests using REL, PRG and SEQ files. 

Features 
* Allows executing of tests on multiple drives in one session. 
* Allows saving results of tests to a text file for later retrieval. 
* Benchmarks 400, 40, and 4 block SEQ file CRUD access. 
* Benchmarks 2k and 4k PRG CRUD access. 
* Benchmarks 50 record REL file CRUD access. 

1983 Richvale Telecommunications - Color 80 is one of the best looking 80 column tools I have seen. The font is clean and easy to read and supports color.

This isn't so much a program as it is intstructions on how to use the dataset on a Commodore 64 or 128 to play regular audio recordings through the computer.  There is a type in program in one of the documents that also lets your control the volume level while playing back the audio.

Directory Plus is a neat little BASIC program that will read all the files on a disk and either displays or prints details about each file such as the type, start track / sector and decimal load address.

Disk Finder - searches through the disk for any occurrences of a specified string.  The program is compiled and cannot be easily changed.

DOS Changer changes the dos type as stored on track 18, sector 0.  the dos type, if not "a", will not allow any scratching or saving of files on the disk.  this program can change such "locked" dos back to normal as well as locking it.

Drive Clean Util - causes the drive motor to run to allow a cleaning disk to contact the read/write head for a prolonged period.

Apparently there is a game called "The Wonderful World of Eamon". This program lets you edit the monster and artifact file.

File Protector is a handy little utility that lets you lock and unlock files on a disk so they can't be accidentally scratched.

Floppy Memory Read  / Write is a super simple program that lets you read and write data from the RAM of a floppy drive.

This disk image has several programs on it that will assist you in generating a Jiffy DOS ROM image from a real Jiffy DOS chip in your C64 that can be used with emulators.

This program reads a squential file which contains the code for a high resolution bit mapped graphic.  I can't really tell you anymore than that.  I believe the program came with the Total Telecommunications terminal program.

Written by Jan Siren & Anthony Marsh - Identifile will examine the beginning of a file not matter the type and tell you what kind of file it is (ie. Basic Program, Text File, ML Program).

Brought to you by The Knights of Eternal Evil - This handy trainer will let you edit your characters for this classic RPG.

Written by Snow Dog - LCP is a utility that will create a new person on a Little Computer People disk. If you don't remember LCP, it is basically an old school game like "The Sims" except I don't believe you can actually control the people... more like watching a fish tank.

Metric Conversions is a BASIC program for the Commodore 64 that converts all sorts of imperial measurements to the metic system equivallent.

MS-DOS 64 by Michael Gregg is a cute simulation of what MS-DOS might have looked like on a Commodore 64 back in 1987.

Name Doctor changes the name of the disk as stored on track 18, sector 0.

No Knock - when used before reading disk files with sector errors, this program will prevent knocking of the read/write head when the error is detected.  the main portion of this program is one line which can be added to any basic loader. 

This little utility will tell you if your Commodore 64 has old or new CIA chips.

PiffyDOS - Programmers JiffyDOS

JiffyDOS from CMD has almost become a defacto standard for the Commodore world. It's compatility, speed and features makes it the natrual choise for users today. I found it very interesting how CMD managed to sqeeze everything into that 8kb of ROM and started to disassemble the code. With the Omicron reassembler I got about 100k of text that i started looking into. I ported the text to my PC and started dokumenting the code. This was back in '94.
After a few months work I finally had understood and documented the entire JiffyDOS-KERNAL. Since then, I have modifyed my own JiffyDOS with lots of new features. My goal was to have a programmer-friendly KERNAL in my system... And here I am.Extended Basic...
* MOC and MOX are two new commands that allows you to transfer data to and from a 17xx REU.
* Input numbers in hex/bin/oct format using $,%,& as prefix.
* MON command to examine both internal and REU memory.
* additional errorhandling for the REU commands.
More Function Keys...
* using the CTRL and F-keys allows you to fastcopy the entire memory to and fram the REU.
* CTRL + F1 copy C64 internal to REU bank 2.
* CTRL + F3 copy REU bank 2 to C64 internal.
* CTRL + F5 copy C64 internal to REU bank 3.
* CTRL + F7 copy REU bank 3 to C64 internal.Additional features...
* Display the loadadresses (both when using JiffyDOS drives and normal drives).
* CTRL + X. Copy REU bank1 to C64 internal and execute program at $9000. (Rescue routine for FairLights Xmem Assembler, or any other program working the same way.)
* FAST memorycheck that NOT destroys adr $8000 ar $a000 if an external memory is found. PiffyDOS-patcher patches your original JiffyDOS and saves the PiffyDOS to disk for later being burned into a EPROM.

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.

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.

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.

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.