ZipLib 2
By:Hasin Hayder
This class can be used to pack multiple files to create a single compressed archive in the .ZIP format.
This class is based on a library known as zip.lib.php written by Eric Mueller, Denis125 and Peter Listiak. It was extended to make it more flexible adding features like adding files listed in an array.
The [...]

ZIPlib
By:Pascal Rehfeldt
You can use this class to add single files, complete dirs or ASCII files as PDF to a ZIP archive.
Download:
http://www.ziddu.com/download/7491484/ziplib-2003-04-14.zip.html

The Zipa
By: aniel Horvath
This is a simple class that can be used to extract files from a ZIP archive.
It uses the PHP ZIP extension to list all files in a ZIP archive and extract them to the current directory.
Download:
http://www.ziddu.com/download/7491330/zipa-2006-09-28.zip.html

PHP Yahoo Messenger Archive Decoder

By : Protung Dragos
This class can be used to parse and extract information from Yahoo Messenger chat history files.
It can parse a given chat history file and extract several details of each message that was exchanged in the chat sessions.
The class retrieves the message text and length, timestamp and the identifier [...]