So, it has been decided to thin the herd. Only these plugins will be for sale: Greebler, Unfurl, InterPoser Pro, and Drop It! Pro. If you really want one of the discontinued plugins (Symmorphy, InterPoser Ltd, Collision Deformer for R12 and earlier), please email a request with your Cinema 4D 11-digit serial number so that I can issue you a serial number and provide download links.
There are two reasons for this decision. First, those plugins are pretty much past their usefulness. Second, I am beginning work on new plugin projects of a more consequential and useful nature. I promise that these will not be yet another render engine or a cog generator. The past year has been spent doing online courses at MIT OCW in order to expand my programming, mathematical, and algorithm design skills despite working more than full-time.
I hope to have the first looks at the first project within a couple months. Wish me success and thank you for all of your continued support!