pkzip

Crack legacy zip encryption with Biham and Kocher's known plaintext attack.

Analyze zipfile, either local, or from url

zipdetails - Display details about the internal structure of Zip files.

BruteForce PKZip/ZipCrypto breaker

Smarter brute-force password searching for PKZIP encrypted files

A fast, efficient streaming library for creating ZIP files on the fly in pure userland PHP without any external tools, PHP extensions, or physical disk storage requirements.

A port of the cwithmichael/zip-blitz program to Clojure.

Find or build Info-ZIP unzip