This is kext for LSI MegaRAID SAS (not Fusion MPT) family of controllers. This one was requested few times at InsanelyMac and other Mac-related forums.
All info is provided in README and original topic.
Release is built with current Xcode (6.1.2) and toolchain, it is x32-x64 only and targeted for Yosemite. 10.10.
Credit to dukzcry (developer) and okrasit (memory allocation fix)