maybe you don't like Google Now because of your privacy vor because you can't have extensions.. Then CMHome is for you! It's Cyanogenmod's Open-Source alternative to Google Now.
It should work on all KitKat Roms.
1st install CMHome.apk, THEN install Trebuchet.apk. after both installed, long tap on homescreen, swipe settings up and at Search Screen select CMHome.
Tested on Moto G Stock ROM unroot → working.
INFO: Both APKs were pulled from cm11 nighly from 2nd August 2014 for Nexus 4. Both apks aren't modded, so all rights go to cyanogenmod. It's just an apk share
Have fun, Xorg