Affordable, advanced Zip .NET Component with many features:

Open a Zip on the
Web.
Open and read or unzip the contents of a Zip file from a URL.
Standard WinZip
Password-Protection
is Supported. Create or open/decrypt password-protected Zips.

OpenFromMemory Allows
you to open a Zip that is stored in your program's memory.
This was created to allow
programs to access Zips loaded from sources such as a database
(an Oracle BLOB for
example).
Includes a robust set of events that allow you to
closely monitor the
progress while zipping and unzipping.
Has the ability to abort
any zip or unzip
operation while in progress.
AES Encryption Encrypt your data
using up to 256-bit
AES encryption. Also supports Blowfish and Twofish encryption
algorithms.
Embed
ZIPs into EXEs Embed ZIP files directly into EXEs, and access
them from your program.
The ZIP is embedded as a named resource, and any number of
ZIPs can be embedded in
a single EXE.
Create Self-Extracting EXEs Works with the
Chilkat Zip 2 Secure EXE
utility to access ZIPs embedded in EXEs created by that
utility.
Unzip Newer Unzips
files based on last-modification time.
Set Exclusions
Exclude files matching wildcarded
filenames, such as "*.log".
Existing Zip Component
Features

Create New ZIPs
Create new ZIPs from existing files, memory data, or
other existing ZIPs.
Delete
Files in ZIPs Remove specific files within a ZIP.
ZIP
Entire Directories Recursively
descend directories to ZIP everything.
Add Files
to ZIPs Adds files to existing
ZIPs.
Merge ZIPs Merge any number of ZIPs into one
ZIP.
Unzip Unzip and auto-create
directories as needed.
Unzip Matching Unzip
only files matching a wildcarded pattern.

Access to Compressed Data Directly access
the data in its compressed format.
Memory
Compression/Decompression Use ZIP compression
without ever writing files.
Memory-to-ZIP
Conversion and Back Allows direct access
to data within files in the ZIP.