zip folder

Batch Zip Toolkit allows you to compress and decompress files individually .

Ruby Zip Library

Python Zip Library

Perl Zip Library

Java Zip Library

VC++ 8.0 class library for .zip file format, .gzip, Unix .Z, and self-extractor

VC++ 7.0 class library for .zip file format, .gzip, Unix .Z, and self-extractor

VC++ 6.0 class library for .zip file format, .gzip, Unix .Z, and self-extractor

A professional tool: recover lost passwords from ZIP archives

United States 5-Digit ZIP Code Database, Gold Edition