Developer "NitroGlycerine33" is really making headway on Eclipse for the OG Moto X. He has already released 4 progress builds and is getting closer to a stable build. The first build was basically a base build. Since then a few features have been added to the Rom. Features include Lollipop theming, AOSP 5.0 Email with Exchange PIN hack, Google messaging, Google Calendar, CM calculator, Removed IME toggle, CRT off animation, extended reboot menu (reboot, recovery, bootloader, hot reboot), disabled annoying safe volume notification, enabled wifi tether and more! Head to the link below for the download.
Via ElementalXDesigns