HY-Plugins has released HY-SEQ16x3 which they describe as an analog style step sequencer. It's available in VST format for Mac and Windows. HY-SEQ16x3 has 3 sequencer units and 2 LFO units. Each sequencer unit can be controlled independently.
Pricing and Availability:
A free version is also available with a single sequencer unit and no LFO unit.
Using Chains and automation to switch keyboard setups