My favored CMS is not listed here. Your should have a look at it and write a portrait.
There are uncounted wonderful Open Source CMS, of course. But CMS Garden is not a platform writing about CMS. It is a platform maintained by CMS communities, by volunteer enthusiasts who put effort in actively presenting their CMS.
The participation of a CMS depends on the contributions of its community. When a few preconditions are met, it's completely up to the community's effort to make their CMS visible in CMS Garden. Are you a member of that community? Welcome! CMS Garden is not a closed society.