This article refers to the original Ziptorrent C++ Bittorrent client, and the 2007 version of Azureus modified specifically by MediaDefender Inc. to disrupt Bittorrent downloads.
ZipTorrent was a BitTorrent client

BitTorrent client

BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc. used for uploading and downloading files via the BitTorrent protocol. BitTorrent was the first client written for the protocol. It is often nicknamed Mainline by developers denoting its official origins. Since version...

 written entirely using C++

C++

C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as an intermediate-level language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell...

 with the intention of being small and fast. The last known version, 1.3.7.3, was released in 2005, and development has stopped.

Main features

• Built-in RSS
  RSS (file format)
  RSS is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format...
  
   Reader, with the ability to track many concurrent feeds
• Built-in IRC Client, with the ability to connect to many networks at once, and the ability to send each other torrent files via DCC, or via direct links (URL's) to torrents.
• Automatic content catcher - Enter your desired keywords, your undesired keywords, and ZipTorrent will automatically fish for such content on RSS and on IRC channels, and automatically download that content for you.
• Torrent Archive "wakes up" dormant torrents when your computer is not used

3rd Party Software used

• XPCOM
  XPCOM
  XPCOM is a cross-platform component model from Mozilla. It is similar to Microsoft COM and CORBA. It has multiple language bindings and IDL descriptions so programmers can plug their custom functionality into the framework and connect it with other components.-The model:XPCOM is one of the main...
  
   (Mozilla Foundation)
• Microsoft Foundation Class Library
  Microsoft Foundation Class Library
  The Microsoft Foundation Class Library is a library that wraps portions of the Windows API in C++ classes, including functionality that enables them to use a default application framework...
  
   (Microsoft)
• Libtorrent (Arvid Norberg)
• TinyXML
  TinyXML
  TinyXML is a small, simple XML parser for the C++ language. It is free and open source software, distributed under the terms of the license of zlib/libpng.- Features :...
  
   (Lee Thomason)

MediaDefender "ZipTorrent"

In 2007 MediaDefender

Mediadefender

MediaDefender, Inc. is a company that offers services designed to prevent alleged copyright infringement using peer-to-peer distribution. They are controversial because of their use of unusual tactics such as flooding peer-to-peer networks with decoy files that tie up users' computers and...

 Inc. created a modification of the popular bittorrent client Azureus

Vuze

Vuze is a BitTorrent client used to transfer files via the BitTorrent protocol. Vuze is written in Java, and uses the Azureus Engine. In addition to downloading data linked to by .torrent files, Azureus allows users to view, publish and share original DVD and HD quality video content...

, taking over the name "ZipTorrent". This modification is in no way associated with the original ZipTorrent standalone client. The MediaDefender Ziptorrent is designed to simulate (spoof) other clients and hinder Bittorrent traffic.