Arkos Tracker is a music and sound effect composing tool that runs on a PC or Mac (i.e. it is not a CPC tool), but which can be used to create tunes for Amstrad, MSX and Spectrum computers.
Arkos Tracker 1 and its tools are built using the .NET framework. It is possible to run the tools, but not the Tracker itself, on Linux, using Mono.
Arkos Tracker 2 is a rewrite of Arkos Tracker and is available natively for both Windows and Linux. It is written in C++ using the Juce toolkit.