Noise Reap made some very interesting modules in the past. This 24dB / octave filter is an OTA design so has a decidedly watery feel to it. It's overdrive input is capable of dirtying things up nicely though, so this filter sits well in a lot of different spaces sonic-ally.

One can never have too many filters... try this one!

From Noise Reap:

The LOLA Filter is a 24dB/octave OTA based analog lowpass filter with a vintage rubbery feel. Like giant extra-dimensional beings puddle splashing inside your head. Drive control sets the signal level into the filter. This is capable of subtle harmonic distortion if cranked. The peak control sets the resonant peak intensity at the cutoff frequency. If set high enough, the resonance self oscillates for clean 1V/oct sine generation. The Lola doubles as an accurate sine wave VCO! Sub to supersonic frequency range.

A second input (IN2) is provided for quick mixing situations. Try mixing a saw or square and sine wave directly into the Lola for an instant acid style bassline sound. With the CV input attenuator fully clockwise, the CV input becomes a second 1v/oct input.