After Working on it alone for a year, the founder and original developer of Nova Launcher Kevin Barry has stopped working on Nova Launcher and the open sourcing efforts. More Info: https://teslacoilapps.com/nova/solong.html
I never used nova, but I'm so used to KISS now, it's the first thing I install on a new phone. It's also funny to lend the phone to someone, because nobody understands it as it's very different (especially how I set it up).