in TOP Delphi Components :: A selected collection of open source, free, and commercial Delphi components to help you add ZIP / UNZIP functionality to your application. Compressing and deflating files and directories in well-known formats like ZIP, RAR, TAR, GZIP, CAB will not longer be a missing piece in your Delphi projects!
Go to the full list to select your Delphi ZIP / UNZIP (Compression) Components.
Related:
I’m missing Delphi wrappers for 7-zip (http://www.7-zip.org/links.html)
7zip has truly awesome compression, but also the option of zip-compatibility.
–jeroen
The popular JCL has compressions components in JclCompression.pas which use the 7zip dll. They work great.