List of Google TV launchers

Below is a list of Google TV launchers that are available.

Projectivity Launcher - https://play.google.com/store/apps/details?id=com.spocky.projengmenu&pli=1

Dispatch - https://play.google.com/store/apps/details?id=com.spauldhaliwal.dispatch

AT4K Launcher - https://play.google.com/store/apps/details?id=com.overdevs.at4k

Arc Launcher - https://github.com/meddouribadis/arclauncher

FLauncher - https://play.google.com/store/apps/details?id=me.efesser.flauncher

ATV Launcher Pro - https://play.google.com/store/apps/details?id=ca.dstudio.atvlauncher.pro&hl=en

Projectivy Launcher

Projectivy Launcher is an alternative interface for Android TV or Google TV.

https://play.google.com/store/apps/details?id=com.spocky.projengmenu&hl=en&gl=US&pli=1

This launcher can also be used with Amazon Firesticks as well.  But it cannot be set as the default.

https://firetvsticks.com/projectivy-launcher/

https://firestickhacks.com/install-projectivy-launcher-on-firestick/

tvQuickActions

tvQuickActions is an app for Google TV to allow button remapping.  A free version is available.

https://play.google.com/store/apps/details?id=dev.vodik7.tvquickactions.free

https://www.techhive.com/article/2158068/this-free-app-makes-google-tv-so-much-better.html

Flauncher

Flauncher is a free alternative launch interface for Google TV.

https://chromewiki.com/install-flauncher-disable-google-tv-home-chromecast-with-google-tv/

https://gitlab.com/flauncher/flauncher

This app can be installed on an Amazon Fire TV as well.

https://troypoint.com/flauncher/