1BITDRAGON - 1BITDRAGON is a user-friendly music creation software that allows anyone to make music without having to be an expert or have thousands of dollars of gear.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
OnlineSequencer.net - OnlineSequencer.net is an online music sequencer that allows users to create beats and music tracks.
Sketch - Professional digital design for Mac.
GoatTracker - This is a crossplatform C64 music editor.
Affinity Designer - Professional creative software, exclusively for Mac.