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).
AidAim ZipForge - Free!
Fast ZIP compression library-Delphi/C++ Builder. Special transaction system optimizes the speed and allows canceling all modifications at any time. Native VCL, no DLL/OCX. Group operations with files. Creates self-extracting archives. Lots of demos.
Affiliate Creator
Affiliate Creator is a shareware utility that helps shareware authors and their affiliates to create custom builds easily.
PowerArc
High efficient Data Compression Library for Delphi
SharpZipLib
SharpZipLib is a free, open-source compression library for .NET. It supports Zip, Gzip, Tar, and Bzip2. Also computes checksums. Currently lacks Zip file splitting/spanning, custom self-extracting Zip files, and reading/writing to memory.
addZIP Compression Components
The addZIP Compression Components are the simplest way to add thePKZIP compatible file compression and decompression to your programs. These royalty-free, multithreaded ActiveX/COM components are compatible with all 32-bit development software.