There you can access to hundreds of free midi files you can use for commercial and non-commercial purposes.
Midi files (Musical Instrument Digital Interface) are an industry-standard protocol that enables electronic musical instruments, computers, and other equipment to communicate, control, and synchronize with each other.
MIDI composition takes advantage of the MIDI interface to allow musical data files to be shared among various electronic instruments by using a standard list of commands and parameters known as General MIDI (GM).
