areson
lowpass2
lowres
lowresx
lpf18
moogvcf
moogladder
reson
resonr
resonx
resony
resonz
rezzy
statevar
svfilter
tbvcf
vlowres
bqrez
Hi-pass filters: atone, atonex
Low-pass filters: tone, tonex
Biquad filters: biquad and biquada.
Butterworth filters: butterbp, butterbr, butterhp, butterlp (which are also called butbp, butbr, buthp, butlp)
General filters: clfilt
aresonk
atonek
lineto
port
portk
resonk
resonxk
tlineto
tonek