I dislike systemd for numerous reasons. Unfortunately, it has been adopted by most popular Linux distributions, including Debian, Ubuntu, Fedora and others. It is also becoming increasingly difficult, or even impossible, to replace within these distributions (e.g. I've failed to drop systemd on Debian Jessie).
Anyway, I want to try other Linux distributions which do not use systemd by default. What are some prominent examples of such distributions, and their strengths and weaknesses?
Note: If someone we're at a point where there are many of these, feel free to describe their categories or significant representatives.