It's a dll engine extension project launched by RamboPlay and aimed at providing a codec fix for CNCnet5.dll based on Syringe.
While ZZeus is independent of Ares by AlexB, you can use Ares, Phobos with using ZZeus.
Currently, usage agreement is the basis of all cooperation. It is not a problem which kind of code hosting is used, we don't want to open source of this dll. But you can use the release binary under License.
ATTENTION: Due to Syringe Dictionary Order, ZZeus must be the last DLL it reads, we highly recommend you do not change the DLL name.
Usage: Puts ZZeus.dll the same directory as your Ares.dll and run the game in Ares (+Phobos or Kratos) mode.
Check Release Page.
Changelog is here.