http://www.winzip.com
2. PKWARE
http://www.pkware.com
3. Netzip
http://www.netzip.com
4. Turbo Zip
http://www.turbozip.com
5. ZipWiz
http://www.zipwiz.com
6. CCZip
http://www.cczip.com
7. Crusher!
http://www.dcmicro.com
8. Xceed Zip
http://www.xceedsoft.com
9. gzip
http://www.gzip.org
10. Stuffit
http://www.aladdinsys.com