Older versions of WinRAR

WinRAR is a 32-bit Windows version of RAR Archiver, the powerful archiver and archive manager. RAR files can usually compress content 8 to 15 percent more than ZIP or ARJ files. WinRAR's main features include strong general and multimedia compression, the ability to process of non-RAR archive formats, long filename support, programmable self-extracting archives (SFX), damaged-archive repair, authenticity verification, embedded file comments, and encryption. Unicode is supported in archive file names, allowing non-English file names to be handled painlessly.

Older versions of WinRAR (and other softwares) available at this link.

jZip - A free alternative to WinZip

jZip is a new and free compression utility for Windows. jZip supports multiple popular archive formats such as Zip, RAR, 7z, ISO, TAR and GZip. It is fully compatible with archives created by other utilities such as WinZip, WinRar and 7-Zip.
jZip is built on proven and reliable 7-Zip technology. 7-Zip technology is fast and achieves compression ratios that are higher or equivalent to other leading compression programs. jZip differs from applications like WinZip when it comes to cost. jZip is 100% free to use on any computer at work, at home, at school or anywhere else.
jZip is fully compatible with all your current Zip, RAR, 7z and many other formats. Creating a high quality and reliable compression engine is not an easy task. In order to provide the most reliable compression experience jZip was built on top of a state of the art compression engine - 7-Zip - a well proven, highly reliable compression engine.

Details and download available at this link.