CuraEngine
From MatterControl Manual
CuraEngine is a third-party slicing engine which has been integrated into MatterControl.
Origin
CuraEngine is written in C++. It was officially released with Cura in June 2013.[1]
Documentation
The complete list of settings can be found on the CuraEngine Settings page.
Repository
CuraEngine is an open source project hosted on GitHub: https://github.com/Ultimaker/CuraEngine