MIDI Patchbay 1.0 (by Peter Yandell)
MIDI patchbay lets you hook up your various pieces of MIDI software and hardware and pass MIDI data between them, applying assorted filters on the way.

PYMIDI Framework 1.1 (by Peter Yandell)
The PYMIDI Framework provides a set of classes and utility functions for communicating via MIDI, both with physical devices (MIDI interfaces, MIDI controllers, etc.

MIDI Patchbay 1.0 (by Peter Yandell)
MIDI patchbay lets you hook up your various pieces of MIDI software and hardware and pass MIDI data between them, applying assorted filters on the way.

GB Midi Import 1.1. (by Andy Drabble)
GB Midi Import facilitates the import of midi information from a standard midi file into GarageBand.

MIDI Keyboard 1.7 (by Hopkins Multimedia)
MIDI Keyboard allows for MIDI events to be sent to programs such as Finale, Reason, Garage Band, and others that accept MIDI input.

Sweet MIDI Player 2.2.5 (by Roni Music)
Sweet MIDI Player is a MIDI player for not only auditioning all types of MIDI files, but for modifying the MIDI files themselves.

MIDI Builder 031212 (by Useful Software)
MIDI Builder enables the creation of 1 to 4-voice MIDI files in "step-entry" fashion.

Dent du Midi 0.9 (by Bery Rinaldo)
Dent du Midi is a drag-and-drop application that takes standard MIDI files and generates AIFF containers for each track which contains note data.

MIDI Data Miner 1a (by Ollie Glass)
MDM uses a neural network to learn correlations between notes and control changes in a MIDI file.

MU MIDI Controller 2.6 (by Dramatica Software)
Music Unfolding MIDI Controller is a software MIDI controller.

MIDI Monitor 1.1.6 (by Snoize)
MIDI Monitor is a utility for Mac OS X which displays MIDI signals in a variety of formats.

MidiClock 1.2 (by Granted Software)
MIDI clock lets you synchronize multiple sequencer applications on the same computer or over a MIDI connection.

SlimServer 6.5.0 (by Slim Devices, Inc.)
Slim Devices introduces SlimServer 6.

NoteAbilityPro 2.319 (by Keith Hamel)
NoteAbility Pro is a professional music notation package for the Macintosh OS-X operating system.

netTunes 2.3.1 (by Shirt Pocket)
netTunes lets you control iTunes running on one Macintosh from another, using iTunes' native interface.

v.m.k 1.6 (by Fredrik Olofsson Musikproduktion)
This application lets you simulate a midi keyboard on your computer keyboard.

Audio Hijack 2.2.5 (by Rogue Amoeba)
Audio Hijack gives all your audio that extra bit of sweetness.