Note hold blasters delays note-off events for up to 2 seconds. It only processes a monophonic MIDI stream, and was made to assist with audio to MIDI software that suffers from choppy note transitions.
Midi hammer is a midi lfo effect where a clock syncs the lfo, there’s a couple modes, it was built to be modulated by CC64(lfo amount)to sweep a range by using a momentary pedal.
GlitchHead is a realtime glitch (stutter) effect to be triggered by CC#64. It is always recording snippets of incoming audio, then playing it back and recording over it, according to a table of fixed values that are swept by an LFO, producing a choppy glitch effect. The sound also varies in pitch and playback rate slightly as triggered by a clocked rate.
The plugins are freeware.
More info: RunBeerRun