Inknote

Runs entirely in the browser with no installation required, making it accessible across devices, as emphasized in the description and README.

Offers basic synth sounds during editing and playback, allowing users to hear compositions immediately, as noted in the updates.

Features a responsive interface optimized for mobile devices, enabling music composition on tablets and smartphones, highlighted in the key features.

Includes copy, cut, paste, undo, redo, and per-bar time signature/clef changes, providing precise control over scores, as detailed in the advanced editing tools.

Actively invites contributions from developers, designers, and musicians, fostering collaborative development, as stated in the contribute section.