See zZounds for great deals on MIDI Solutions products including patch bays and MIDI adapters. Mark Of The Unicorn MOTU make a variety of audio and MIDI interfaces for musical needs, including USB devices for both PC and Mac. Check zZounds for great deals on MOTU MIDI hardware. Music Quest Music Quest MIDI cards were aquired by Opcode who in turn are no longer doing business. As Opcode have been recently aquired the state of ongoing support is currently unknown.
Some drivers are still available for download.
Phil Rees MIDI Accessories UK based manufacturer fo MIDI accessories including MIDI merge, MIDI thru boxes, monosynth interfaces and sync units. Swivel A Palm GM synth and MIDI adapter. It comes bundled with two MIDI software packages from Minimusic , the BeatPad pattern based sequencer and Notepad, a notation based composing tool.