Nova Launcher is created by teslaCoil, Its the oldest launcher in android market, Nova launcher is having to version one is paid version and other is free version, In paid version you will get to unlock many gesture like double tap to lock and swipe down, swipe up etc. which is not available in free version. I am using nova from last 9 months and its very lite and work very fine. Compare to other launcher nova launcher doesn’t support many themes but like other launcher it wont hung much and very smooth.