by ManiacTools MIDI Converter Studio is a handy software utility that converts MIDI to MP3, WAV, OGG and WMA formats easily. Simply drag and drop a MIDI file, and the rest is done automatically. Free download.
by Midi2Wav.com With Midi2Wav Recorder you can convert MIDI files to Wav or MP3 using external soundfonts or your sound card synthesis. It provides batch conversion, built-in mixering and tempo control. You can change MIDI instruments, their volume and balance.