Jazz++ is a full featured, audio capable, cross-platform MIDI sequencer. Jazz++ offers a lot of functions normally only found in expensive sequencer software, and is used by professionals and hobby musicians all over the world.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.
