Rosegarden is a free software digital audio workstation program developed for Linux with ALSA and Qt4. Developed by Chris Cannam, Richard Bown, Guillaume Laurent, et al.
License: Open Source
OpenMPT is primarily focused on sample-based music production and MIDI manipulation, making it ideal for electronic and chiptune music. In contrast, Rosegarden offers a more comprehensive solution for music composition, particularly for notation and audio projects, but comes with a steeper learning curve.