Naive Lead is a concept synth. Oversampling is used to antialias (to an extent) trivially rendered oscillators. This may offer some benefit in contrast to other methods (especially if you like aliasing).
This plug-in is presented to offer some insight into DSP to promote informed application of synthesis. If you know what you're using, you'll know when it's best used.
Up to five filter algorithms are available (fast, Stilson/Smith Moog, Karlsen, SV, biquad) for four modes.