A MIDI-like music file format that was originally created for the Commodore Amiga computer. As the module file format became more popular, it was eventually transferred to other computing platforms, and split up into seperate subformats. Modules are extremely flexible because, unlike MIDI files, they can use individual wave samples as instruments in addition to the samples already provided by the sound hardware. Although modules are perfect for making techno music, some composers have managed to create jazz, rock, pop, ethnic, hip-hop, and even symphony orchestra music. Composers and sequencers of module music are called trackers, and the place where module music is exchanged is called a scene. The module music format is starting to gain notoriey in the videogame industry, and was used in popular games such as Unreal and Homeworld.

Note: A module is NOT the same as an MP3.

Most popular Module Subformats:
Pro Tracker (MOD)
Impulse Tracker (IT)
Scream Tracker 3 (S3M)
Fast Tracker 2 (XM)
Unreal Music (UMX)
Unis 669 (669)
Mad Tracker (MT2)

Plopbox.net is an online jukebox owned and maintained by Mandrixx and Yopkool.It hosts scenemusic from various platforms like PC, Atari STFM\STe\Falcon, C64 and Amiga, with various styles(mainly chipmusic and demostyle, but also techno, trance, classic, rock, etc). Features include a playlist, oneliner, forums, logos like on Pouet.net and the ability to submit and download tunes.
The name of the site is said to come from the word 'plop' which means 'cool'.