EDIT--- NM this post, i didn't see that is just OC apps you want to make a list of...
Here are a couple on my list...
MHDD -
http://hddguru.com/content/en/software/2005.10.02-MHDD/
MHDD is the most popular freeware program for low-level HDD diagnostics.
MHDD supports these interfaces: IDE, Serial ATA, SCSI. Also there is a possibility to access an USB storage, there are drivers for emulation (USB->SCSI).
This software can make precise diagnostic of the mechanical part of a drive, view SMART attributes, perform Low-level format, bad sector repair, different tests and tens of other functions.
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HDDScan -
http://hddguru.com/content/en/software/2006.01.22-HDDScan/
HDDScan is a freeware program for low-level HDD diagnostics.
HDDScan supports IDE/SATA/SCSI hard disk drives, RAID arrays, external USB/Firewire hard disks, flash cards.
The program can scan the surface, view SMART attributes, adjust AAM, APM (Power Management), etc.
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Magic Boot Disk v2.0 © HDDGURU -
http://hddguru.com/content/en/software/2006.02.10-Magic-Boot-Disk/
This MS-DOS boot disk contains the following:
* Based on Windows 98 Second Edition boot disk
* Drivers for IDE and SATA CDROM
* Fixed FDISK.EXE: Support of hard disk drives bigger than 137 GB
* Patched FORMAT.COM:
o Option /Q (QuickFormat) now can be used to format floppies and hard disks quickly even if they're never been formatted before
o MS-DOS version check has been removed
* SmartDrive (SMARTDRV.EXE) and other basic MS-DOS stuff such as SYS, ATTRIB, DELTREE, LABEL, MEM, MOVE.
* MHDD 4.6 with SCSI/ASPI and ATAPI support and Primary IDE enabled
* USB Mass Storage support drivers for MHDD
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7z -
http://www.7-zip.org/
Another compession program, also used in benches.