Abacus

This VSTi is not available at the link above, but you can find it here: http://www.krakli.com/legacy-plugins/ .

Krakli also offers many other great, free synths and effects.

Yes. Many of his older products are now discontinued. And some are very difficult (even impossible for some of them) to find because they are not all archived in his "legacy" page.

But Krakli keep on developing new products always, on and on... for our great pleasure.