Zeam Launcher is described as 'Zeam is an attempt at creating a minimalist, lightweight and free home screen launcher for Android devices' and is an app in the OS & Utilities category. There are more than 25 alternatives to Zeam Launcher for Android, Android Tablet, Android SDK, F-Droid and Kindle Fire. The best alternative is Lawnchair Launcher, which is both free and Open Source. Other great apps like Zeam Launcher are KISS Launcher (Free, Open Source), Trebuchet (Free, Open Source), Microsoft Launcher (Free) and Smart Launcher (Freemium).
The rootless Pixel Launcher that is both heavily customizable and ships with backported Android Oreo features and tweaks. Based on Launcher3 from AOSP, Lawnchair has all the features of the Pixel Launcher (including the Google Feed), plus customizability.
Trebuchet launcher is an AOSP (Android Open Source Project) based launcher developed by LineageOS team. This is a port of the popular LineageOS 15 ROM's Trebuchet launcher to enjoy on any device; working with any android version equal or greater than Android 5.x.