The original version of Nanoloop was released in 1998 by Oliver Wittchow. It is used to create music using Music tracking and sequencing. There is also a version of Nanoloop for Gameboy Advance
The "original" Gameboy releases are numbered 1.x, the newest being 1.5 (which was released in January of 2009). The Gameboy Advance versions are numbered 2.x, the most recent version being 2.3 (which was released in 2008).
In February 2010, a version of Nanoloop was released for the iPod Touch / iPhone.