MusicLab MIDI Connection Center

MusicLab MIDI Connection Center screenshots

Simple MIDI Connection Center Utility makes MIDI THRU connections

Alternative downloads

Sweet MIDI Player 32
This program lets you play MIDI files and adjust them the way you want.
SmartScore X Midi Edition
SmartScore X Midi Edition allows to scan sheet music and turn them into MIDI.
Sweet MIDI Player
Sweet MIDI Player will let you play and modify MID and KAR files.