Advanced RAR Repair
Advanced RAR Repair(ARAR) is a powerful tool to repair corrupt or damaged RAR and SFX archives. It uses advanced technologies to scan the corrupt or damaged archives and recover your files in them as much as possible, so to minimize the loss in file corruption. ... Support to repair RAR and SFX archives on corrupted medias, such as floppy disks, Zip disks, CDROMs, etc. ... Support to find and select the RAR and SFX archives to be repaired on the local computer. ... Support to recover encrypted RAR archives.
http://www.rar-repair.com/arar.exe - 690Kb - Download - Screenshot

7-Zip
7-Zip is a file archiver with the highest compression ratio. The program supports 7z, ZIP, RAR, CAB, ARJ, LZH, CHM, CPIO, RPM, DEB, GZIP, BZIP2, Z and TAR formats. Compression ratio in the new 7z format is 30-50% better than ratio in ZIP format. Also 7-Zip compresses to ZIP 2-10% better than... 7-Zip has additional powerful command line version and FAR Manager support.
http://prdownloads.sourceforge.net/sevenzip/7z432.exe - 821Kb - Download - Screenshot

ArcConvert
This convertor can convert the following archives:7-ZIP/ LZH/ CAB/ ZIP/ ARJ/ ACE/ RAR/ TAR/ TGZ/ GZ/ Z/ BZ2/ YZ1/ YZ2/ GCA/ BEL/ RPM/ DEB/ BH/ Noa32/ HKI/ PAQAR/ SQX/ HA/ ZOO/ UHARC/ LFB/ ZLIB/...
http://archivconvert.sourceforge.net/arc_convert.zip - 4Mb - Download - Screenshot

Simplyzip
Simplyzip is a multi archiver in english/german/swedish/italian at this time. Can Open: ZIP, CZIP, ACE, CAB, RAR, TAR, GZIP, LZH,BZ2,SQX, RS,UUE,XXE,BASE64,UCL,ARJ,ZLIB, RPM, DEB,7-ZIP Create: 7z,ZIP,CZIP,Cab,LHA,TAR,TAR GZ TAR BZ2,ACE (optionale DLL), Deepfreezer SQX, UCL, RS, ZIP-SFX/LHA-SFX... Further features: MULTI-ZIP. ... ZIP-REPAIR and some other think. ... Backup to disk (CD or so). ... This program is FREEWARE.
http://www.paehl.de/simplyzipse.exe - 2Mb - Download - Screenshot

Batch Zip Toolkit
Batch Zip Toolkit is the award winning, all in one file compression package that allows you to compress and decompress files individually - in batch. Although Batch Zip Toolkit is based around the popular Zip format, in reality it actually supports 13 different compression formats including Lha,... We also recognise that you may wish to Batch Zip files that may have irregular file names, for instance, if you have a folder full of files with both upper and lowercase filenames that are not uniform, using the rename facility within Batch Zip Toolkit, you can at the click of a button, renamed...
http://www.dtrleisure.com/bztk/files/bztk300s.exe - 1b - Download - Screenshot

KRyLack Password Recovery
KRyLack Password Recovery - Recover Lost Passwords for ZIP, RAR and ACE archives. Features: Unlimited Password Length support, Complete Drag-and-Drop Support, RAR Archives (All Versions including 3. 0) Support, Encrypted Filenames Support, ZIP Archives Support, ACE Archives Support, SFX Archives... 0) Support - RAR Archives with encrypted Filenames Support - ZIP Archives Support - ACE Archives Support - SFX Archives Support - And many many more formats planned - Brute-Force attack - Brute-Force with Mask attack - Dictionary attack - Support for User-defined charset - Autosave password...
http://urlcut.com/klpassrecsetup.exe - 3Mb - Download - Screenshot

PowerArc
High efficient Data Compression Library for use with Delphi, C++ or VB. Support Rank, ZIP, BZIP and PPM compression algorithms. Compression ratio more than 1. 5-2 times better than ZIP/RAR archiver. Compression speed up to 8 Mb/sec (on PIII-600).
http://www.softcomplete.com/download/powerarc.zip - 385Kb - Download - Screenshot

WinRAR
WinRAR is a 32-bit Windows version of RAR Archiver, the powerful archiver and archive manager. WinRAR's main features are very strong general and multimedia compression, solid compression, archive protection from damage, processing of ZIP and other non-RAR archives, scanning archives for... Designed to work on Windows 95/98/NT/2000/ME/XP/2003 WinRAR provides complete support for RAR and ZIP archives and is able to unpack and convert CAB, ARJ, LZH, TAR, GZ, ACE, UUE, BZ2, JAR, ISO, Z, 7-Zip archives.
http://www.rarlab.com/rar/wrar351.exe - 991Kb - Download - Screenshot

DiffUnlock
DiffUnlock is a Password Recovery Software. Rar, Ace and Zip formats are supported at present.
http://www.different4all.de/downloads/diffunlock_setup.exe - 11Mb - Download - Screenshot

EF Find
EF Find is a powerful search program for Windows. Look for files, text, HEX sequences and regular expressions inside 7-Zip, ACE, ARC, ARJ, BZIP2, CAB, CPIO, GZIP, IMG, ISO (ISO9660), LHA, RAR, RPM, SFX, SQX, TAR, TBZ, TGZ, ZIP and ZOO archives. Multilingual. ... Shareware, FREE Updates.
http://www.efsoftware.com/sw/effind.zip - 2Mb - Download - Screenshot