PKZIP
Data security software from pkware secures data files at rest and in transit with passphrase or certificate-based encryption and cross-platform capability
http://www.pkware.com/
FreeZip
Freezip - freeware zip and unzip software for ms windows
http://www.ozemail.com.au/~nulifetv/freezip/
WinAce
WinAce
http://www.winace.com/
Wincox
Wincox
http://www.mimarsinan.com/
WinRAR
Winrar provides the full rar and zip file support, can decompress cab, gzip, ace and other archive formats
http://www.rarsoft.com/
WinZip
WinZip
http://www.winzip.com/