FL Studio Mobile - Create & save multi-track music projects on a smartphone
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Splice Beat Maker - Make and share beats in your browser
Rakarrack - Rakarrack is a richly featured multi-effects processor emulating a guitar effects pedalboard.
Sampulator - Make (and record) beats on your keyboard
ToneLib GFX - The perfect custom tone with a complete guitar studio in your computer