The Retrokits RK006 is a tiny little multi functional MIDI interface. It has USB, 2x MIDI inputs and 10x MIDI Outputs. However as all the MIDI Outputs are on 3.5mm jacks these can also perform as analog trigger/gate/clock or they can do DIN Sync/Sync 24.
The RK-006 is about 7x5x1cm in size (3x2x0.4″) which is very small indeed. You can order it with either just a USB dongle option or with all the MIDI cables to make full use of the MIDI i/o straight away. You can use it as a MIDI Merge and THRU box, per port MIDI filtering and multiclock processing, a USB host: HUB support, SMF playback and a USB device with Individually addressable OUT & IN ports. The small size however does mean that all your 5 pin MIDI DIN cables will need 3.5mm adapters…
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Older Music Machines & the People Who Still Use Them