OpenMPT

OpenMPT is an open-source track-based music creation tool for Microsoft Windows, but using Wine, you can get it to run on Linux. It is based on Olivier Lapicque's Modplug Tracker, which was first released in 1997.

History as Modplug Tracker
In 2001, Olivier Lapicque made Modplug Tracker a public domain program. He stopped development entirely in 2003.

History under OpenMPT
In 2006, the project was picked up by several developers.

Trivia

 * Supported file formats in terms of saving in OpenMPT are ProTracker MOD, Scream Tracker 3 S3M, FastTracker 2 XM, Impulse Tracker IT, and its native MPTM file format.