i3 from home:jloeser:branches:X11:windowmanagers project
Select Your Operating System
Add repository and install manually
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jloeser:branches:X11:windowmanagers/15.5/home:jloeser:branches:X11:windowmanagers.repo zypper refresh zypper install i3