Palette is the software used in the Space Palette Pro, an instrument that lets you fingerpaint sound and visuals using your fingers as 3D cursors on Sensel Morph pads.
palette_engine is the Go-based central brain of the system that:
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starts a realtime engine for looping and control of sound (via MIDI output) and visuals (via OSC to Resolume).
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monitors Morph and MIDI devices for input,
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has an API for 1) managing presets of sound and visual parameters, 2) starting and stopping various programs (Bidule, Resolume, etc), and 3) other things.
palette_gui is a python-based executable that provides a graphical interface to select presets and edit their parameters. It works for either a single Morph or four of them (as in the Space Palette Pro).
palette_monitor is a Go-based executable that monitors the palette_engine process, so that if palette_engine crashes for any reason, it will be automatically restarted.
Palette.dll is a Freeframe plugin draws basic visual shapes (sprites) in response to OSC messages sent from palette_engine. The sprites are animated (moving, resizing, color fades) by the Freeframe plugin, but the position and all other parameters are sent by the palette_engine.
Resolume is the host for Freeframe plugins that generate and process visuals. The output of the ffgl/Palette.dll plugin is processed by a pipeline of Freeframe effect plugins - the standard effects that come with Resolume. There are four independent layers in Resolume - A, B, C, D - and the palette_engine controls all of the Freeframe effect parameters independently for each layer.
Bidule is the VST host that listens for MIDI ouput from the engine. Typically each MIDI input port in Bidule is distributed to 16 instances of a particular synth.
Loopbe30 is a utility on Windows that is used to create virtual MIDI ports.