Ultralight MIDIPlayer is described as 'MIDI player for high-speed playback of Black MIDI files' and is an app in the Audio & Music category. There are three alternatives to Ultralight MIDIPlayer for a variety of platforms, including Windows, Wine, Android Tablet, iPad and Mac. The best alternative is Synthesia, which is free. Other great apps like Ultralight MIDIPlayer are Piano From Above (Free, Open Source) and Keysight (Paid).
Keysight is a real-time configurable midi visualization platform powered by Unreal Engine, built for piano-focused streamers and content creators. Beautiful, performance-accompanying visualizations have never been simpler!