Patent free, high-quality data compressor for Windows or Unix.

Open source command line data stream compressor and archiver.

Unzip program for Windows that doesn't prompt before overwriting files. Supports shell links, drag and drop, and command line.

Free archiving utility with Windows integration, script support and ZIP-64 for huge archives. Website provides a free support forum.

Supports a wide variety of archive types, creates self extracting archives, integrates with mail and virus scan, and integrates with Windows Explorer.

A full-featured ZIP program with SFX and ZIP-64 support. Also supports AES encryption 7-ZIP format and integrated image-viewing.

ZIP program with a skinned interface and full support for over 20 compression formats.