Sebastian Marek
Cinema 4D SDK
Write powerful plugins and scripts enhancing Cinema 4D and your workflows using the Python and C++ Cinema 4D SDK.
Studio: Mighty
Cineware SDK
Read and write Cinema 4D documents without a Cinema 4D installation using the Cineware C++ SDK.
Stephen Davidian
ZBrush GoZ SDK
Build a bridge from your app into ZBrush to import and export data with the ZBrush GoZ SDK.