Note: this post is from 2005, outbound links may be broken.
Admiral Quality releases Naive LPF v0.5
This filter has been developed to closely model the way some real world analog circuits work to achieve a vintage, analog feel.
You will find this filter has a very warm, even distorted, analog flavor. But the distortion it does impart tends to sound very musical to the ear, particularly when processing individual instrument tracks.
Download the plug-in from Admiral Quality VSTs.