Seequencer is a visual MIDI player and an electronic keyboard emulator, can display each note of MIDI sequences on the screen, just as pianists perform live.
You can enjoy your favorite songs pre-recorded in MIDI files, adjust the tempo & volume, transpose them to other keys freely in real-time with Seequencers easy to use interface. It also provides a virtual keyboard that can be played with mouse and computer keyboard easily.

If you can't find MIDI files, please try those coming along with Windows, for exmaple, C:\Windows\Media\flourish.mid.
Laptop users may find keyboard accelerators inconvenient to use. It will be improved in future updates.

The license of this software is Free Trial Software, the price is $2.50, you can free download and get a free trial.