1)   MIDI Converter Studio 6.0
MIDI Converter Studio is a handy software utility that converts MIDI to WAV, MP3, OGG and WMA formats easily. Simply drag and drop a MIDI file, and the rest is done automatically. Free download.

 2)   MIDI Workplace 2.1
Still think that converting music from MIDI is rather a poser? You're mistaken! Need to work with parts of different instruments? Just tick those you need. Want silence during converting and flexible settings? MIDI Workplace can do that for you!

 3)   MIDI to WAV Renderer 1.7.1
A new program, effective and easy in use for anyone! The best in MIDI to WAV Renderer is an ability to render files avoiding any foreign sounds, as it converts files without playing the original sound and no foreign sounds can get in the output file.