Ant Commander is a fully configurable file manager. Several file systems are suported: file, zip, ftp, webdav, etc. Several kinds of panels are available: directory table; directory tree, text editor, image viewer, html viewer, command line, etc.

DOS Command Line Email client for sending and receiving email. Features: HTML or plain message formatting, mail merge, ZIP compression, message forwarding and auto-reply, import data from any ODBC data source, and more.

EldoS PKI Tools is a set of programs designed for encryption and signing of files using X.509 certificates and for management of these certificates. You can easily sign, encrypt, decrypt files or verify signatures just in a couple of clicks.

.NET 2.0 Zip component for C#, VB.NET, and ASP.NET providing managed classes for creating, managing, and unzipping Zip archives. Supports progress monitoring, AES strong-encryption, Gzip, Unix .Z compression, and creating self-extractor EXE’s.

AMF Back Me Up is easy to use backup software. Back Me Up backs up software to zip files, which means that you can recover your files without special software. Back Me Up supports zip disks, hard disks, CD and DVD writers and more.

ActiveX Zip component for VB6, ASP, Delphi, VBScript, providing managed classes for creating, managing, and unzipping Zip archives. Supports progress monitoring, AES strong-encryption, Gzip, Unix .Z compression, and creating self-extractor EXE.

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.

Zip compression programmers library