ClayWorks has been a project of mine for many years (It's contemporaneous with 3DS Max and actually older than Blender!) and over the years it's developed in to a sophisticated modelling tool, one that I use for most of my own needs and as a framework for building applications. However, for most of this time it's been a personal project and as such, I've rarely had the time to create a polished release.
I'm currently developing a new, clean and more modern scriptable engine framework for all Totga software projects and have ported the core procedural modelling functionality of Clayworks to this new system. I'm very excited about the possibilities provided by the new engine, so watch this space!Clayworks also has its own Google+ page here
I also have a personal site here.