Must have Applications for the BitTorrent User

File Compressors
Many torrent files have their contents compressed and archived into multiple smaller parts. Most of the time the archives are distributed in .rar file format that needs to be extracted to get the file contents. Scene rules restrict files released by the scene to be packed in .rar format.

WinRar:
WinRar is a fast, lightweight and easy archiver that can compress and decompress .rar .zip .7z and other popular file formats. The user interface of WinRar is very user friendly featuring a popular GUI (Sinkable) and an optional command line interface. WinRar is available for Windows, Mac OSX, Linux and FreeBSD in x86 or x64 versions. Localized language version is also available for download from the download page.
Download WinRar

7 Zip:
7-Zip is a free and open source file archiver with a high compression ratio. 7-Zip is extremely fast and features powerfull GUI similar to Windows. 7-Zip is available for Windows 7 / Vista / XP / 2008 / 2003 / 2000 / NT / ME / 98 in 79 languages. Supported formats include .rar .zip .7z .iso .tar etc. Download size is only 1 MB for x86 and x64 versions.
Download 7Zip

Video Playback
Movies and videos downloaded over the internet usually are found as .avi or .mkv files. These files have been encoded in XVID or Matroska format. To properly playback these files we need proper codecs and players to be able to process the video and sound data.

VLC Player:
VLC player is a free and open source cross-platform multimedia player that can play most of the popular file formats in use today. VLC is the choice of many when deciding upon a video player because it is fast, easy and powerful which does not require any additional codecs to be installed for proper file playback. If your files don’t play in VLC it most probably is damaged. VLC is available for Windows, Linux, Mac and other OS.
Download VLC Player

KMPlayer:
KMPlayer or KMP is a powerful, advanced and free multimedia player that can play most of the file formats in use today. KMP allows its users to fully configure the playback parameters for users requiring advanced control over their player. KMP comes with the necessary codecs to playback the popular file formats.
Download KMPlayer

CCCP:
CCCP is short for Combined Community Codec Pack. This is a popular codec pack featuring all of the codecs and filters required for video playback. CCCP comes with Media Player Homecinema which is similar to Media Player Classic. This codec pack can be used to playback your files in your favourite video player without having to install and configure a new player.
Download CCCP

NFO Viewer
When we download our files off bitorrent usually we get files with .nfo extensions. These files contain useful information about the release. Its often contains instructions and guide on how to properly use the release (example in setting up of a downloaded application). To view these files we need nfo viewers.Some of the good available nfo viewers are as follows

QuickNFO:
QuickNFO is what it states to be quick, lightweight and simple viewer. It is a basic viewer to allow us to read the nfo files witout any hassle. The setup file is as small as 0.3 MB
Download QuickNFO 

GetDiz:
GetDiz is a powerfull .nfo and .txt viewer. It allows you the possibility to save any .txt, .diz or .nfo files as GIF images and can be installed as a portable version on a USB stick.
Download GetDiz for Windows