Someone put together the GUI faces for some of the naked plugins.
These 53 are a drop in the bucket of “no interface available” plugins.
(These may all; be preexisting original UIs , I recall looking up the Calf collection)
Here is the (Jan 9 2021) Github page. (they seem easy to install)
The plugin names:
3BandEQ.lv2
3BandSplitter.lv2
alo.lv2
amsynth.lv2
argotlunar2.lv2
calf.lv2
dexed.lv2
dexed.lv2-Presets
drowaudio-distortion.lv2
drowaudio-distortionshaper.lv2
drowaudio-flanger.lv2
drowaudio-reverb.lv2
drowaudio-tremolo.lv2
fabla.lv2
fabla808.lv2
fabladirtySouth.lv2
fablaEasternHop.lv2
fablaHardElectro.lv2
fablaKorgyKit.lv2
fablaSavageDrums.lv2
gx_mbcompressor.lv2
helm.lv2
JuceOPL.lv2
midi-display.lv2
mididebug.lv2
mod-volume-2x2.lv2
mod-volume.lv2
modmeter.lv2
modspectre.lv2
Obxd.lv2
README.md
ReFine.lv2
sorcer.lv2
sorcer.lv2-Presets
synthv1.lv2
TAL-Dub-3.lv2
TAL-NoiseMaker-Noise4U.lv2
TAL-NoiseMaker.lv2
TAL-Vocoder-2.lv2
triceratops.lv2
vocoder.lv2
vocproc.lv2
Wolpertinger.lv2
ZamGEQ31.lv2
ZynAddSubFX.lv2
ZynAddSubFX.lv2presets
ZynAlienWah.lv2
ZynChorus.lv2
ZynDistortion.lv2
ZynDynamicFilter.lv2
ZynEcho.lv2
ZynPhaser.lv2
ZynReverb.lv2