Daniel Smith has released MIDI patch bay VST, a free plugin that lets you reroute MIDI channels.
- Merge, split or filter out channels entirely
- Drag & Drop interface
- Multiple links per connector
The VST is currently only available for PC Windows, but the source code is available and since it was done with the Juce framework it might compile cross platform.
Daniel also has a few other plug-ins available on his website:
- Pedal Trigger VST: step Sequencer driven by a MIDI sustain pedal
- Big Blue Delay VST: Multi-delay VST effect
- Big Blue Piano VSTi: Virtual “electric” piano
- Big Blue Organ VSTi: Hammond-style drawbar organ simulation