FLATHUB - Apps for Linux, right here
Yay - Yay is an AUR helper written in go, based on the design of yaourt, apacman and pacaur.
AppImageHub - AppImage applications for Linux without installation
paru - An AUR helper written in Rust and based on the design of yay. It aims to be your standard pacman wrapping AUR helper with minimal interaction.
Flatpak - Flatpak is the new framework for desktop applications on Linux
Octopi - Powerful Pacman (GUI | frontend) written in Qt