Apps similar to QMidiPlayer include Synthesia, which has a free version. Other options are Piano From Above, Midiano.com, Piano Trainer and MIDITrail. You can choose from more than 10 Piano Trainers like QMidiPlayer for Windows, Mac, iPad, the web and iPhone.
Cross-platform software providing interactive piano practice using MIDI or computer keyboard, real-time feedback, finger number hints, note labels, sheet music or falling notes display, repeat practice sections, lively visualizations, and online scoreboards for all skill levels.
United States
Piano From Above is a program that turns learning the piano into a videogame. You can open any MIDI file and simply play the notes as they fall.
United States
Interactive piano-learning web app. Runs in all modern browsers. Plays all MIDI files & supports MIDI devices as input.
Germany
EU
Piano Trainer is an app designed to help users learn basic piano scales and chords at their own pace using a MIDI or QWERTY keyboard. The app offers two modes: Quiz and Practice. In Quiz mode, users can test their knowledge of the circle of fifths and key recognition.
"MIDITrail" is a MIDI player which provides 3D visualization of MIDI datasets. You can enjoy not only listening but also viewing. MIDITrail supports SMF format 0/1, and multiple MIDI ports. MIDITrail is available for Windows, Mac OS X and iOS.
Japan
With this program you can listen to your own MIDI files (or play live) while viewing these visualizations:
United States
SoundFont Midi Player is a full-featured MIDI player/router and real-time MIDI synth combo, especially useful for Soundblaster (Live, Audigy, X-fi) users who can load SoundFonts automatically in real-time.
HungaryEU
Initially a private app built for fast playback of large MIDI files, UMP offers an easy solution for Black MIDI recordings.
Piano Nova is a piano learning app that helps you learn songs from real sheet music. Upload your own score as a PDF, photo, or MusicXML file, listen to playback, slow down difficult passages, loop sections, and practice note by note with a MIDI keyboard.
CyprusEU
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!
